DSG repair · DQ400E

DQ400E DSG repair

The DQ400E is a 6-speed dual-clutch transmission with a wet clutch, designed for hybrid applications and also known as the 0DD. It combines the DSG principle with an interface to the vehicle’s hybrid system.

This page covers the symptoms most commonly associated with DQ400E faults, the mechatronic issues behind them, the fault codes that accompany them, and how to identify the correct mechatronic assembly or part.

Transmission overview

What makes the DQ400E different

The DQ400E uses a wet dual clutch and is built for hybrid drivetrains, where the transmission works alongside an electric motor. The clutch and hydraulic design reflect that combined duty.

Faults on this family can involve hydraulic control and the hybrid control interface, because the transmission interacts with the hybrid system as well as the engine.

The mechatronic assembly holds the hydraulic and electronic control for the transmission. Because of the hybrid interface, confirming the exact unit and generation matters before ordering.

Transmission familyDQ400E (6-speed hybrid DSG)
Also known as0DD
Clutch typeWet dual clutch (hybrid)
Gears6 forward
Factory code0DD
Symptoms

Common DQ400E 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 DQ400E fault codes

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

CodeDescription CategoryStatus
30097 Transmission fluid pressure sensor — manufacturer event-memory code Pressure sensor Review
P0218 Transmission overtemperature condition Hydraulic pressure Review
P0607 Control module — implausible operation / hardware related Internal control unit (TCU) Review
P0715 Input / turbine speed sensor A — circuit Speed sensor Review
P0731 Gear 1 — incorrect ratio Gear ratio / gear loss Review
P074A Gear 1 — incorrect ratio Gear ratio / gear loss Review
P0842 Transmission fluid pressure sensor — low signal Pressure sensor Review
P0867 Transmission fluid pressure — low / implausible Hydraulic pressure Review
P0962 Pressure control valve 1 — low control current Valve / solenoid electrical Review
P0966 Pressure control valve 2 — low control current Valve / solenoid electrical Review
P172A Hydraulic pressure — too high Hydraulic pressure Review
P172B Hydraulic pressure — too low Hydraulic pressure Review
P1735 Clutch 1 position sensor — electrical fault Clutch faults Review
P1736 Clutch 2 position sensor — electrical fault Clutch faults Review
P179C Main pressure valve — electrical malfunction Valve / solenoid electrical Review
P17BF Hydraulic pump system overload protection Hydraulic pressure Review
P189C Function restriction — insufficient pressure build-up Hydraulic pressure Review
P2711 Unexpected mechanical gear disengagement Gear ratio / gear loss Review
P2884 Engine disconnect clutch K0 — stuck open Clutch faults Review
U0101 Lost communication with TCM Communication Review
Mechatronic unit

DQ400E mechatronic replacement unit

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

DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770 (0DD 927 770). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770A

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770A (0DD 927 770 A). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770B

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770B (0DD 927 770 B). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770C

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770C (0DD 927 770 C). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770D

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770D (0DD 927 770 D). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770E

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770E (0DD 927 770 E). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770F

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770F (0DD 927 770 F). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD927770J

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD927770J (0DD 927 770 J). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025B

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025B (0DD 325 025 B). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025C

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025C (0DD 325 025 C). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025D

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025D (0DD 325 025 D). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025E

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025E (0DD 325 025 E). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025F

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025F (0DD 325 025 F). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025H

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025H (0DD 325 025 H). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025J

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025J (0DD 325 025 J). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325025K

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325025K (0DD 325 025 K). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325065E

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325065E (0DD 325 065 E). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325066F

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325066F (0DD 325 066 F). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325101C

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325101C (0DD 325 101 C). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325101D

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325101D (0DD 325 101 D). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325101F

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325101F (0DD 325 101 F). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325101J

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325101J (0DD 325 101 J). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
DQ400E Exchange available

DQ400E DSG mechatronic unit — 0DD325473

Refurbished DSG mechatronic unit for the DQ400E (6-speed hybrid DSG), OEM part number 0DD325473 (0DD 325 473). Supplied as a complete assembly with the integrated control electronics.

Replacement unit Price on request
Exchange unit Price on request
Request a Quote
Frequently asked

DQ400E repair questions

What does DQ400E repair usually involve?

Most DQ400E faults that reach the mechatronic are addressed by replacing the mechatronic assembly, or by replacing the specific part indicated by the fault code. A diagnostic scan and the vehicle details confirm which.

Can the DQ400E be repaired rather than replaced?

Some issues are part-level, others are assembly-level. We confirm the correct approach from the fault codes, the symptoms and the part number before quoting.

Do you supply parts as well as assemblies for the DQ400E?

Yes. Selected parts for this family are listed on the DQ400E parts page, and mechatronic assemblies on the DQ400E mechatronics page.

Send us your DQ400E details

Tell us the symptoms, the part number and any fault codes, and we will confirm the correct DQ400E unit or part by email.