DSG repair · DQ250

DQ250 DSG repair

The DQ250 is a 6-speed dual-clutch transmission with a wet clutch, also known as the 02E. It has been used widely across the Volkswagen Group behind transversely mounted engines, and it is one of the most common DSG families in service.

This page covers the symptoms most commonly associated with DQ250 faults, the mechatronic issues behind them, the fault codes that accompany them, and how to identify the correct mechatronic assembly or part.

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Transmission overview

What makes the DQ250 different

The DQ250 uses a wet dual clutch, with the clutch packs running in an oil bath. The oil cools the clutches and carries away wear debris, which suits higher torque and heavier use than a dry clutch.

Because the clutches and the mechatronic share a hydraulic environment, the DQ250’s fault patterns often centre on hydraulic control — pressure regulation, solenoid behaviour and the sensors that feed the control unit.

The mechatronic assembly combines the hydraulic control unit and the electronics in one housing. When pressure control or a sensor drifts, the symptoms can appear as harsh shifts, delayed engagement or limp mode.

Transmission family	DQ250 (6-speed wet DSG)
Also known as	02E
Clutch type	Wet dual clutch
Gears	6 forward
Factory code	02E

Symptoms

Common DQ250 symptoms

The symptoms below are the ones most frequently reported for this family. They are starting points for diagnosis — not a list of causes. Any one of them can be produced by more than one underlying issue.

Juddering on pull-away

Vibration felt through the vehicle as it moves from standstill, often most noticeable on the 1st-to-2nd transition and more pronounced when cold.

Delayed engagement of D or R

A pause between selecting D or R and the vehicle actually moving, or an abrupt take-up of drive.

Flashing PRNDS or warning lamp

The gear indicator flashes, usually with a transmission warning message — a strong indicator of a control-side fault.

Limp mode

The transmission restricts available gears, often leaving only odd or only even gears, and refuses to shift normally.

Loss of drive

The vehicle does not move when a gear is selected, or loses drive while driving. The most serious symptom — diagnose promptly.

No reverse gear

Reverse becomes difficult or impossible to engage, sometimes with a grinding noise.

Mechatronic faults

Known mechatronic-related issues

These are the mechatronic-side issues most often associated with this family. The mechatronic unit contains the hydraulic control and the electronics, so faults here frequently produce the symptoms above.

Hydraulic pressure loss. Worn seals, a tired accumulator or internal leakage reduce the pressure available to operate the clutches and shift forks.
Solenoid and valve faults. Sticking or electrically failed solenoids prevent the unit from directing pressure correctly, producing harsh or missing shifts.
Sensor faults. Speed and position sensors inside the unit can fail or drift, leaving the control unit without reliable feedback.
Electronics and connector faults. Heat and vibration can crack solder joints or corrode the connector, causing intermittent or permanent faults.

Fault codes

Documented DQ250 fault codes

64 documented codes are listed for this family. Select a row to expand the detail, or open the full family page.

Code	Description	Category	Status
00194	Ignition key removal lock — implausible signal	Manufacturer-specific code	Review
Description The DQ250 transmission control unit stores 00194 when it detects the following condition: Ignition key removal lock — implausible signal. A manufacturer-specific code that relates to configuration, basic setting or data status rather than to one failed part. It often appears after a repair, a control unit replacement or software work. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Transmission warning light Emergency mode or restricted functions Shift quality not as expected after a repair Possible causes Basic setting (adaptation) not performed or aborted Changed data or software status Signal problem from another system (e.g. the ignition lock) Transmission: DQ250 Category: Manufacturer-specific code Status: Documented — review advised Related components: Transmission control unit (TCU) · Basic setting procedure This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
01087	Basic setting not performed	Manufacturer-specific code	Review
Description The DQ250 transmission control unit stores 01087 when it detects the following condition: Basic setting not performed. A manufacturer-specific code that relates to configuration, basic setting or data status rather than to one failed part. It often appears after a repair, a control unit replacement or software work. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Transmission warning light Emergency mode or restricted functions Shift quality not as expected after a repair Possible causes Basic setting (adaptation) not performed or aborted Changed data or software status Signal problem from another system (e.g. the ignition lock) Transmission: DQ250 Category: Manufacturer-specific code Status: Documented — review advised Related components: Transmission control unit (TCU) · Basic setting procedure This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
01208	Data records in control unit altered	Manufacturer-specific code	Review
Description The DQ250 transmission control unit stores 01208 when it detects the following condition: Data records in control unit altered. A manufacturer-specific code that relates to configuration, basic setting or data status rather than to one failed part. It often appears after a repair, a control unit replacement or software work. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Transmission warning light Emergency mode or restricted functions Shift quality not as expected after a repair Possible causes Basic setting (adaptation) not performed or aborted Changed data or software status Signal problem from another system (e.g. the ignition lock) Transmission: DQ250 Category: Manufacturer-specific code Status: Documented — review advised Related components: Transmission control unit (TCU) · Basic setting procedure This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0218	Transmission overtemperature condition	Hydraulic pressure	Review
Description The DQ250 transmission control unit stores P0218 when it detects the following condition: Transmission overtemperature condition. The fault concerns the hydraulic supply of the mechatronic unit. The control unit compares the required system pressure with the measured pressure and stores the code when the pressure is too low, too high, builds up too slowly, or the pump runs outside its normal operating time. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Delayed gear engagement or loss of drive Pump running unusually often or for a long time Emergency mode or no drive in gear Transmission warning light Possible causes Internal hydraulic leakage (valve body, seals, accumulator) Faulty hydraulic pump or pump motor Low or contaminated transmission fluid Faulty pressure sensor or pressure control valve Transmission: DQ250 Category: Hydraulic pressure Status: Documented — review advised Related components: Hydraulic pump / pump motor · Pressure accumulator · Mechatronic valve body This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0700	Transmission control system — malfunction	Transmission control	Review
Description The DQ250 transmission control unit stores P0700 when it detects the following condition: Transmission control system — malfunction. A general transmission control fault: the control unit has detected a malfunction in the transmission system that is not tied to one specific component. Codes stored at the same time usually point to the actual cause. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Emergency mode Harsh or missing shifts Transmission warning light Possible causes Faults stored in other categories at the same time Power supply or wiring problem Mechatronic unit fault Transmission: DQ250 Category: Transmission control Status: Documented — review advised Related components: Transmission control unit (TCU) · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0701	Transmission control system — range/performance	Transmission control	Review
Description The DQ250 transmission control unit stores P0701 when it detects the following condition: Transmission control system — range/performance. A general transmission control fault: the control unit has detected a malfunction in the transmission system that is not tied to one specific component. Codes stored at the same time usually point to the actual cause. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Emergency mode Harsh or missing shifts Transmission warning light Possible causes Faults stored in other categories at the same time Power supply or wiring problem Mechatronic unit fault Transmission: DQ250 Category: Transmission control Status: Documented — review advised Related components: Transmission control unit (TCU) · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0702	Transmission control system — electrical malfunction	Transmission control	Review
Description The DQ250 transmission control unit stores P0702 when it detects the following condition: Transmission control system — electrical malfunction. A general transmission control fault: the control unit has detected a malfunction in the transmission system that is not tied to one specific component. Codes stored at the same time usually point to the actual cause. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Emergency mode Harsh or missing shifts Transmission warning light Possible causes Faults stored in other categories at the same time Power supply or wiring problem Mechatronic unit fault Transmission: DQ250 Category: Transmission control Status: Documented — review advised Related components: Transmission control unit (TCU) · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0715	Input / turbine speed sensor A — circuit	Speed sensor	Verified
Description Input/turbine speed sensor circuit fault. On DSG this can be a sensor, wiring or mechatronic-side issue. Verify signal integrity before replacement. Symptoms Shift quality complaints Warning lamp Limp mode Possible causes Speed sensor fault Wiring / connector issue Mechatronic internal fault Transmission: DQ250 Category: Speed sensor Status: Verified Related components: Speed sensor · Mechatronic unit · Wiring harness Open full detail Request a DQ250 quote DQ250 repair
P0716	Input / turbine speed sensor G182 — implausible signal	Speed sensor	Review
Description The DQ250 transmission control unit stores P0716 when it detects the following condition: Input / turbine speed sensor G182 — implausible signal. The fault concerns a speed signal. The control unit needs the input (clutch/turbine) and output shaft speeds to control shifts and clutch slip, and stores the code when a signal is missing, implausible or electrically faulty. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or badly timed shifts Emergency mode Incorrect gear or speed display Transmission warning light Possible causes Faulty speed sensor in the mechatronic unit Wiring or connector fault Metal debris on the sensor or sender wheel Fault in the control electronics Transmission: DQ250 Category: Speed sensor Status: Documented — review advised Related components: Input speed sensor · Output speed sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0720	Output speed sensor — circuit fault	Speed sensor	Review
Description The DQ250 transmission control unit stores P0720 when it detects the following condition: Output speed sensor — circuit fault. The fault concerns a speed signal. The control unit needs the input (clutch/turbine) and output shaft speeds to control shifts and clutch slip, and stores the code when a signal is missing, implausible or electrically faulty. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or badly timed shifts Emergency mode Incorrect gear or speed display Transmission warning light Possible causes Faulty speed sensor in the mechatronic unit Wiring or connector fault Metal debris on the sensor or sender wheel Fault in the control electronics Transmission: DQ250 Category: Speed sensor Status: Documented — review advised Related components: Input speed sensor · Output speed sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0722	Output speed sensor G195 — no signal	Speed sensor	Review
Description The DQ250 transmission control unit stores P0722 when it detects the following condition: Output speed sensor G195 — no signal. The fault concerns a speed signal. The control unit needs the input (clutch/turbine) and output shaft speeds to control shifts and clutch slip, and stores the code when a signal is missing, implausible or electrically faulty. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or badly timed shifts Emergency mode Incorrect gear or speed display Transmission warning light Possible causes Faulty speed sensor in the mechatronic unit Wiring or connector fault Metal debris on the sensor or sender wheel Fault in the control electronics Transmission: DQ250 Category: Speed sensor Status: Documented — review advised Related components: Input speed sensor · Output speed sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0729	Gear 6 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0729 when it detects the following condition: Gear 6 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0730	Incorrect gear ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0730 when it detects the following condition: Incorrect gear ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0731	Gear 1 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0731 when it detects the following condition: Gear 1 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0732	Gear 2 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0732 when it detects the following condition: Gear 2 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0733	Gear 3 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0733 when it detects the following condition: Gear 3 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0734	Gear 4 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0734 when it detects the following condition: Gear 4 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0735	Gear 5 — incorrect ratio	Gear ratio / gear loss	Review
Description The DQ250 transmission control unit stores P0735 when it detects the following condition: Gear 5 — incorrect ratio. This is a mechanical plausibility check: the control unit compares the input and output shaft speeds with the ratio expected for the selected gear. The code is stored when the calculated ratio does not match or a gear drops out unexpectedly. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Engine revs flare without acceleration Gear drops out or the transmission stays in one gear Emergency mode Transmission warning light Possible causes Clutch slip Gear disengaging because of a gear selector or shift fork fault Faulty input or output speed sensor Internal mechanical damage (gears, synchronisers, bearings) Transmission: DQ250 Category: Gear ratio / gear loss Status: Documented — review advised Related components: Speed sensors · Gear selector / shift fork · Dual clutch · Gear set This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0746	Pressure control solenoid 1 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0746 when it detects the following condition: Pressure control solenoid 1 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P074A	Gear 1 — incorrect ratio	Gear ratio / gear loss	Verified
Description The control unit calculated a gear ratio outside the expected range for gear 1. On the DQ250 this can indicate clutch slip, internal hydraulic issues or a monitoring artefact. Confirm mechanically before replacing components. Symptoms Slip in gear 1 Warning lamp Limp mode Possible causes Clutch slip Internal hydraulic issue Sensor / monitoring artefact Transmission: DQ250 Category: Gear ratio / gear loss Status: Verified Related components: Clutch pack · Mechatronic unit Open full detail Request a DQ250 quote DQ250 repair
P0751	Shift solenoid 1 N88 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0751 when it detects the following condition: Shift solenoid 1 N88 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0756	Shift solenoid 2 N89 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0756 when it detects the following condition: Shift solenoid 2 N89 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0761	Shift solenoid 3 N90 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0761 when it detects the following condition: Shift solenoid 3 N90 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0766	Shift solenoid 4 N91 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0766 when it detects the following condition: Shift solenoid 4 N91 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0771	Shift solenoid 5 N92 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0771 when it detects the following condition: Shift solenoid 5 N92 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0776	Pressure control solenoid 2 — open/short	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0776 when it detects the following condition: Pressure control solenoid 2 — open/short. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P079F	Transmission control / gear selector plausibility fault	Gear selection	Review
Description The DQ250 transmission control unit stores P079F when it detects the following condition: Transmission control / gear selector plausibility fault. The fault concerns engaging a gear. The gear selector moves the shift fork hydraulically and a travel sensor reports its position. The code is stored when the gear cannot be engaged, the position does not match the command, or the movement takes too long. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Gear not engaged or engaged with a knock Individual gears missing (often every second gear) Emergency mode Transmission warning light Possible causes Gear selector piston or hydraulic channel fault Faulty travel (position) sensor or sensor magnet Worn shift fork or synchroniser Pressure control fault in the mechatronic unit Transmission: DQ250 Category: Gear selection Status: Documented — review advised Related components: Gear selector (actuator) · Shift fork · Travel sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0841	Transmission fluid pressure sensor A — range/performance	Pressure sensor	Review
Description The DQ250 transmission control unit stores P0841 when it detects the following condition: Transmission fluid pressure sensor A — range/performance. The fault concerns a pressure sensor or pressure switch in the transmission. The control unit uses these signals for clutch and system pressure control, and stores the code when the signal is out of range, too low or implausible. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh engagement or judder Emergency mode Pump running unusually Transmission warning light Possible causes Faulty pressure sensor Wiring or connector fault A real hydraulic pressure problem Fault in the control electronics Transmission: DQ250 Category: Pressure sensor Status: Documented — review advised Related components: Pressure sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0842	Transmission fluid pressure sensor A — low signal	Pressure sensor	Review
Description The DQ250 transmission control unit stores P0842 when it detects the following condition: Transmission fluid pressure sensor A — low signal. The fault concerns a pressure sensor or pressure switch in the transmission. The control unit uses these signals for clutch and system pressure control, and stores the code when the signal is out of range, too low or implausible. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh engagement or judder Emergency mode Pump running unusually Transmission warning light Possible causes Faulty pressure sensor Wiring or connector fault A real hydraulic pressure problem Fault in the control electronics Transmission: DQ250 Category: Pressure sensor Status: Documented — review advised Related components: Pressure sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0868	Transmission fluid pressure — adaptation at limit / low	Hydraulic pressure	Review
Description The DQ250 transmission control unit stores P0868 when it detects the following condition: Transmission fluid pressure — adaptation at limit / low. The fault concerns the hydraulic supply of the mechatronic unit. The control unit compares the required system pressure with the measured pressure and stores the code when the pressure is too low, too high, builds up too slowly, or the pump runs outside its normal operating time. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Delayed gear engagement or loss of drive Pump running unusually often or for a long time Emergency mode or no drive in gear Transmission warning light Possible causes Internal hydraulic leakage (valve body, seals, accumulator) Faulty hydraulic pump or pump motor Low or contaminated transmission fluid Faulty pressure sensor or pressure control valve Transmission: DQ250 Category: Hydraulic pressure Status: Documented — review advised Related components: Hydraulic pump / pump motor · Pressure accumulator · Mechatronic valve body This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0962	Pressure control valve 1 — low control current	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0962 when it detects the following condition: Pressure control valve 1 — low control current. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P0966	Pressure control valve 2 — low control current	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P0966 when it detects the following condition: Pressure control valve 2 — low control current. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P1707	Interference in mechatronic module	Internal control unit (TCU)	Review
Description The DQ250 transmission control unit stores P1707 when it detects the following condition: Interference in mechatronic module. The fault originates in the transmission control electronics integrated into the mechatronic unit. The unit's self-diagnosis has detected an internal error, an implausible internal value or a software problem. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Emergency mode or no drive Intermittent faults that change with temperature No communication with the diagnostic tester Transmission warning light Possible causes Faulty control electronics (circuit board, integrated sensors, bond wires) Overheating or moisture damage Software fault or interrupted programming Unstable power supply Transmission: DQ250 Category: Internal control unit (TCU) Status: Documented — review advised Related components: Transmission control unit (TCU) · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P172A	Hydraulic pressure — too high	Hydraulic pressure	Review
Description The DQ250 transmission control unit stores P172A when it detects the following condition: Hydraulic pressure — too high. The fault concerns the hydraulic supply of the mechatronic unit. The control unit compares the required system pressure with the measured pressure and stores the code when the pressure is too low, too high, builds up too slowly, or the pump runs outside its normal operating time. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Delayed gear engagement or loss of drive Pump running unusually often or for a long time Emergency mode or no drive in gear Transmission warning light Possible causes Internal hydraulic leakage (valve body, seals, accumulator) Faulty hydraulic pump or pump motor Low or contaminated transmission fluid Faulty pressure sensor or pressure control valve Transmission: DQ250 Category: Hydraulic pressure Status: Documented — review advised Related components: Hydraulic pump / pump motor · Pressure accumulator · Mechatronic valve body This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P172B	Hydraulic pressure — too low	Hydraulic pressure	Review
Description The DQ250 transmission control unit stores P172B when it detects the following condition: Hydraulic pressure — too low. The fault concerns the hydraulic supply of the mechatronic unit. The control unit compares the required system pressure with the measured pressure and stores the code when the pressure is too low, too high, builds up too slowly, or the pump runs outside its normal operating time. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Delayed gear engagement or loss of drive Pump running unusually often or for a long time Emergency mode or no drive in gear Transmission warning light Possible causes Internal hydraulic leakage (valve body, seals, accumulator) Faulty hydraulic pump or pump motor Low or contaminated transmission fluid Faulty pressure sensor or pressure control valve Transmission: DQ250 Category: Hydraulic pressure Status: Documented — review advised Related components: Hydraulic pump / pump motor · Pressure accumulator · Mechatronic valve body This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P1733	Gear selector / shift path fault	Gear selection	Review
Description The DQ250 transmission control unit stores P1733 when it detects the following condition: Gear selector / shift path fault. The fault concerns engaging a gear. The gear selector moves the shift fork hydraulically and a travel sensor reports its position. The code is stored when the gear cannot be engaged, the position does not match the command, or the movement takes too long. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Gear not engaged or engaged with a knock Individual gears missing (often every second gear) Emergency mode Transmission warning light Possible causes Gear selector piston or hydraulic channel fault Faulty travel (position) sensor or sensor magnet Worn shift fork or synchroniser Pressure control fault in the mechatronic unit Transmission: DQ250 Category: Gear selection Status: Documented — review advised Related components: Gear selector (actuator) · Shift fork · Travel sensor · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P173E	Clutch 2 pressure control malfunction	Clutch faults	Review
Description The DQ250 transmission control unit stores P173E when it detects the following condition: Clutch 2 pressure control malfunction. The fault concerns clutch control: engagement, adaptation, torque limitation or clutch temperature. The control unit compares the commanded clutch position or pressure with the measured value and stores the code when the difference or the adapted value leaves the permitted range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Judder when pulling away Delayed or harsh engagement Reduced power or emergency (limp-home) mode Transmission warning on the instrument cluster Possible causes Clutch wear or overheating Adaptation values out of range or basic setting not performed Deviation in hydraulic clutch actuation Faulty clutch position or pressure sensor in the mechatronic unit Transmission: DQ250 Category: Clutch faults Status: Documented — review advised Related components: Dual clutch · Clutch actuator / pressure control valve · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P1741	Clutch pressure adaptation — limit reached	Clutch faults	Review
Description The DQ250 transmission control unit stores P1741 when it detects the following condition: Clutch pressure adaptation — limit reached. The fault concerns clutch control: engagement, adaptation, torque limitation or clutch temperature. The control unit compares the commanded clutch position or pressure with the measured value and stores the code when the difference or the adapted value leaves the permitted range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Judder when pulling away Delayed or harsh engagement Reduced power or emergency (limp-home) mode Transmission warning on the instrument cluster Possible causes Clutch wear or overheating Adaptation values out of range or basic setting not performed Deviation in hydraulic clutch actuation Faulty clutch position or pressure sensor in the mechatronic unit Transmission: DQ250 Category: Clutch faults Status: Documented — review advised Related components: Dual clutch · Clutch actuator / pressure control valve · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P1746	Transmission solenoid power relay — electrical malfunction	Valve / solenoid electrical	Review
Description The DQ250 transmission control unit stores P1746 when it detects the following condition: Transmission solenoid power relay — electrical malfunction. The fault is electrical: the control unit monitors the current and resistance of each solenoid and pressure control valve, and stores the code when it detects an open circuit, a short circuit or a control current outside the expected range. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Harsh or missing gear changes Some gears unavailable Emergency mode, often with only certain gears Transmission warning light Possible causes Faulty solenoid or pressure control valve coil Damaged internal wiring or connector in the mechatronic unit Fault in the valve driver stage of the control electronics Contaminated transmission fluid affecting valve operation Transmission: DQ250 Category: Valve / solenoid electrical Status: Documented — review advised Related components: Solenoid / pressure control valve · Mechatronic valve body · Transmission control unit (TCU) This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair
P1748	Transmission control module — programming error	Internal control unit (TCU)	Review
Description The DQ250 transmission control unit stores P1748 when it detects the following condition: Transmission control module — programming error. The fault originates in the transmission control electronics integrated into the mechatronic unit. The unit's self-diagnosis has detected an internal error, an implausible internal value or a software problem. A stored code does not by itself prove that a part has failed. Before replacing anything, check the live data, wiring, connectors, power supply and fluid condition, and confirm the fault on the vehicle. Symptoms Emergency mode or no drive Intermittent faults that change with temperature No communication with the diagnostic tester Transmission warning light Possible causes Faulty control electronics (circuit board, integrated sensors, bond wires) Overheating or moisture damage Software fault or interrupted programming Unstable power supply Transmission: DQ250 Category: Internal control unit (TCU) Status: Documented — review advised Related components: Transmission control unit (TCU) · Mechatronic unit This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part. Open full detail Request a DQ250 quote DQ250 repair

All DQ250 fault codes (64) →

Mechatronic unit

DQ250 mechatronic replacement unit

A replacement mechatronic assembly for this family, with an exchange option agreed manually by email.

DQ250 Exchange available

DQ250 DSG mechatronic unit — 02E927770

Refurbished DSG mechatronic unit for the DQ250 (6-speed wet DSG), OEM part number 02E927770 (02E 927 770). Supplied as a complete assembly with the integrated control electronics.

Replacement unit EUR 880.00