Powertrain
generic / SAE
P2D42
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberD / 42
Possible causes
- Phase B wire shorted to ground high
- Output driver low-side fault medium
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–2000 €
- Estimated time: 2–7 h
- Component: ac compressor motor
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012