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

P05CB

Vehicle Hardware Incompatibility

The ECU detects that one or more connected modules report a hardware variant or part number that is not compatible with the current ECU calibration. Typically appears after replacing a part with the wrong revision or after a software update without matching hardware.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / CB

Possible causes

  • Replacement part has wrong revision high

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 100–1500 €
  • Estimated time: 0.5–4 h
  • Component: vehicle configuration
  • Component: hardware variant
  • 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