P0EB8A/C Compressor Motor Phase W Current Sensor Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P0EB8 indicates that the phase W current sensor of the compressor inverter delivers a value above its usable range. Since the motor is not actually drawing such a current, a short to a positive supply in the sensing circuit or a failed sensor element is the most probable explanation. The W-phase series runs high, low and plausibility from P0EB8 to P0EBA, while the general W circuit code sits apart at P0EC0. No manufacturer documents P0EB8 publicly. GM's first-generation Volt flagged a W-phase reading of plus 68 A or more with the motor stopped under the older code P0D7E, Type B, and demanded a 12 V reset before the test could pass. Air conditioning stops. Counterpart: P0EB9; the same fault on U and V: P0EB2, P0EB5.
- What you may notice
- A/C stops working, warning shown
- Compressor will not restart until the fault is cleared
- Likely causes
- LikelyFailed phase W sensor element
- PossibleW-phase sensing circuit shorted to a positive supply
- RareFault in the W input of the inverter controller
- 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.