P0C10Drive Motor B Inverter Power Supply 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
- P0C10 flags a supply of the motor B inverter that is above its permitted range. Its siblings are P0C0E for a lost or open supply and P0C0F for a low one; P0C0D is the motor A version. No manufacturer documents P0C10 publicly. GM uses only the open-circuit code P0C0E for this supply and describes it as the power feed of the gate-drive board, monitored through the status line of the IGBT module. An overvoltage on that rail can damage the driver circuits, so the controller shuts the inverter down. CARB requires hybrid components to be checked for circuit faults. Expect a warning lamp and loss of the electric drive provided by motor B.
- What you may notice
- Malfunction indicator lamp, hybrid system warning
- Reduced propulsion, motor B unavailable
- Vehicle limited to engine or reduced-power operation
- Likely causes
- LikelyFaulty voltage regulation of the gate-drive supply inside the motor B inverter
- PossibleExcessive 12 V system voltage from the DC/DC converter or an external charger
- RareSupply or sense line shorted to a higher voltage in the harness
- 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: €100 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.