P0EB7A/C Compressor Motor Phase V Current Sensor Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- With P0EB7 the compressor's phase V current value passes the electrical limits but is not credible. The controller compares it with the other two phases and with the current it is commanding; a persistent offset, a reading that lags or is scaled wrongly, or a three-phase sum far from zero all point at the V sensor. No manufacturer documents P0EB7 publicly. GM's 2011 Volt shows one form of such a check, performed at standstill (older codes P0D7C and P0D7D at plus or minus 68 A). Rough compressor running, noise or reduced cooling can appear before the controller gives up and switches off. Electrical faults of the same phase are P0EB5, P0EB6 and P0EBB; the matching checks on U and W are P0EB4 and P0EBA.
- What you may notice
- Uneven compressor running or humming noise
- Cooling weakens, then fails
- Likely causes
- LikelyPersistent offset or scaling error of the phase V sensor
- PossibleSlow or filtered V-phase measurement on the inverter board
- RareFault in the V winding or its internal lead
- 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.