DTC P1AFC GMC
Engine control module authenticate error
Engine control module authenticate error
Description
If the key certification result by KOS-ECU does not match with the engine control module status, KOS-ECU sets the DTC B1A28. CAUTION: When the DTC B1A28 is set, be sure to diagnose the CAN bus line. When replacing the ECU, always check that the communication circuit is normal.
Cause and Solution
Malfunction of CAN bus line Malfunction of KOS-ECU Engine control module malfunction VIN registered in engine control module unmatched
Video Guide
Diagnostic Info
- DTC Code: P1AFC
- Brand: GMC