P0BECDrive Motor A Phase V Current Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0BEC is set when the phase V current sensor of the motor A inverter reports a value above its valid range. In GM's tables the limit is above 700 A for 0.05 of 0.1 s (2016) or 0.1 of 0.15 s (2019), Type A; above 800 A, Type A, on the 2011 Volt with PWM output disabled; and above 700 A, Type B, two trips, on the 2012 two-mode trucks. Because the check runs while the power stage is not switching or the value is far beyond any real current, it isolates a sensor or supply fault rather than an actual overcurrent. It pairs with P0BEB for the low side and P0BEA for offset. Expect reduced drive from motor A and further inverter codes in the memory.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Reduced power from drive motor A
- Likely causes
- LikelyFailed phase V current sensor inside the inverter
- PossibleSensor signal shorted to the sensor supply voltage or open reference ground
- RarePoor contact at an internal or external inverter connector
- 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.