P137A — Internal TCU — hardware fault
Reference detail for fault code P137A on the DQ200 DSG transmission family.
What P137A indicates
The DQ200 transmission control unit stores P137A when it detects the following condition: Internal TCU — hardware fault. 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
Related components
Transmission control unit (TCU) · Mechatronic unit
| Fault code | P137A |
|---|---|
| Transmission | DQ200 (7-speed dry DSG) |
| Factory code | 0AM/0CW |
| Category | Internal control unit (TCU) |
| Status | Documented — review advised |
This code is documented but not independently confirmed. Confirm it against the specific vehicle before ordering any part.
Have this code on your vehicle?
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Related pages for the DQ200
DQ200 repair
Symptoms, mechatronic issues and what repair involves for this family.
DQ200 mechatronics
Replacement mechatronic unit and exchange options for this family.
DQ200 parts
Selected parts most often involved in repair for this family.
DQ200 fault codes
Every documented code for this family in one table.
Have a fault code to check?
Send us the code and the vehicle details and we will confirm the correct unit or part by email.