OBD-II code · Powertrain (generic, extended)
P2D43 A/C Compressor Motor Voltage B High
The voltage B feedback of the electric A/C compressor motor is above the expected window. Phase wire shorted to B+ or driver fault.
Is it safe to drive with P2D43?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPhase B wire shorted to B+
- PossibleOutput driver high-side fault
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Compressor Motor, Wiring Harness, Ecm
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.