P0631low severityPowertrain
VIN Not Programmed or Incompatible - TCM
on 2017 Audi S5 3.0L Supercharged V6 · AWD
What this code means
The vehicle identification number is missing or mismatched in the transmission control module. Commonly seen after TCM replacement or flashing.
Symptoms
- Check engine light on
- Transmission-related configuration errors
- Scan tool VIN mismatch
Common causes
- TCM replaced without VIN programming
- Incorrect VIN programmed
- Module software mismatch
- Faulty TCM
Diagnostic steps
- Read VIN stored in TCM with scan tool
- Compare stored VIN to actual VIN
- Program correct VIN into TCM
- Clear code and verify
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