U0101 — Lost communication with transmission control module (TCM)
Reference detail for fault code U0101 on the DQ200 DSG transmission family.
What U0101 indicates
The transmission control module is not communicating on the CAN network. Symptoms can include the absence of a gear indicator on the dashboard, the transmission refusing to shift, and diagnostic equipment being unable to connect to the transmission control unit.
Symptoms
- No gear indicator on dashboard
- Transmission refuses to shift
- Diagnostic tool cannot connect
- No-start or no-crank conditions
Possible causes
- TCU internal fault
- CAN bus wiring issue
- Power supply to the TCU
- Connector corrosion or damage
Related components
TCU · CAN bus · Wiring harness · Connector
| Fault code | U0101 |
|---|---|
| Transmission | DQ200 (7-speed dry DSG) |
| Factory code | 0AM/0CW |
| Category | Communication |
| Status | Verified |
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.