P0BEDDrive Motor A Phase W Current Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0BED is the general circuit code of the phase W current sensor in the drive motor A inverter, for an electrical fault outside the offset, low and high categories. No manufacturer documents this exact code publicly; GM's hybrid tables from the 2011 Volt to 2019, including the BAS Plus (eAssist) system, use P0BEE, P0BEF and P0BF0 instead. CARB requires hybrid sensor circuits to be monitored. Phase W matters even on systems with only two sensors: GM's eAssist table measures U and W and, if either sensor fails, runs current control in an alternate mode without the sensors. Expect reduced motor A torque, and check for related inverter codes before replacing parts.
- What you may notice
- Hybrid system warning and malfunction indicator lamp
- Reduced power or assist from drive motor A
- Likely causes
- LikelyFailed phase W current sensor inside the inverter
- PossibleSupply or signal fault on the inverter's sensor board
- RareSoftware fault in the motor control processor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.