P0EC0A/C Compressor Motor Phase W Current Sensor Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P0EC0 is the umbrella circuit code for the phase W current sensor in the inverter of an electric A/C compressor. It applies when no valid W-phase value arrives at all, without a split into high, low or implausible; those cases have their own codes P0EB8 to P0EBA. Like the phase V circuit code P0EBB it is numbered out of sequence. No manufacturer documents P0EC0 publicly. For orientation, GM's 2011 Volt checked each compressor phase with the motor stopped and set a fault when the W reading stayed beyond plus or minus 68 A in 30 of 60 samples (older codes P0D7E and P0D7F, Type B, 12 V reset needed). Without the W value the motor control cannot run the compressor. U-phase circuit code: P0EB1.
- What you may notice
- Electric A/C compressor does not start
- No cabin cooling, battery cooling via refrigerant may be limited
- Likely causes
- LikelyFailed W-phase current sensor or inverter board
- PossibleInterrupted W-phase sensing path inside the inverter
- RareMissing supply voltage for the current sensors
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.