AFCM Power Relay Control Circuit High
Voltage on the AFCM power relay control line is above the expected window. Wire shorted to B+ or coil open.
Affected components
- Afcm power relay
- Afcm
- Wiring harness
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open relay coil
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.