OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P0630

VIN Not Programmed or Incompatible ECM or PCM

The Vehicle Identification Number stored in the ECM or PCM is empty or does not match the VIN reported by other modules - typically appears after replacing a control module without programming the VIN.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 30

Possible causes

  • VIN field empty or mismatched high

Symptoms

  • Check engine light on
  • Possible limp mode or no-start
  • Multiple follow-up faults across modules
  • Reset/relearn may be needed after repair

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 60–250 €
  • Estimated time: 0.4–1.5 h
  • Component: ecm
  • MIL / check engine light

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication