A/C Compressor Motor Voltage B Low
The voltage B feedback of the electric A/C compressor motor is below the expected window. Phase wire shorted to ground or driver fault.
Affected components
- Ac compressor motor
- Wiring harness
- Ecm
Common causes
- High likelihood: Phase B wire shorted to ground
- Medium likelihood: Output driver low-side fault
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Related codes
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.