OBD-II code · Powertrain (generic)
P0631 VIN Not Programmed or Incompatible TCM
VIN Not Programmed or Incompatible TCM: the control module has detected this fault condition.
Is it safe to drive with P0631?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVIN field empty or mismatched
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.4–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Tcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.