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.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Replacement part has wrong revisionCommon
Parts involved
- Vehicle Configuration
- Hardware Variant
P05CB is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.