P0BE8Drive Motor A Phase U 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
- P0BE8 is the high-side counterpart of P0BE7: the phase U current sensor of the motor A inverter reports a value above its valid range. GM's tables set it above 700 A for 0.05 of 0.1 s (2016) or 0.1 of 0.15 s (2019), Type A, one trip; above 800 A, Type A, on the 2011 Volt; above 700 A, Type B, on the 2012 two-mode trucks; and above 440 A, Type B, two trips, in the BAS Plus (eAssist) table. A reading this high without matching battery current points to the sensor or its supply rather than real current; genuine excess current is covered by separate overcurrent codes such as P0C01. The inverter then uses a fallback control strategy and motor A delivers less torque.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Reduced power from drive motor A
- Possible shutdown of electric drive
- Likely causes
- LikelyFailed phase U 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.