P0BE5Drive Motor A Phase U 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
- The inverter of drive motor A measures the current in each motor phase with a current sensor; the controller needs these values for torque control and overcurrent protection. P0BE5 is the general circuit code for the phase U sensor, used for an electrical fault that is not classed as offset, low or high. No manufacturer documents this exact code publicly; GM's hybrid tables (2011 Volt through 2019) only use the siblings P0BE6, P0BE7 and P0BE8, and CARB requires hybrid sensor circuits to be monitored. Without a reliable phase U reading the inverter typically switches to a reduced or alternate control mode, so motor A loses power. The sensor sits inside the inverter, which usually means inverter replacement.
- What you may notice
- Hybrid system warning and malfunction indicator lamp
- Reduced power from drive motor A
- Possible loss of electric drive
- Likely causes
- LikelyFailed phase U 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.