P0C0DDrive Motor A 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
- P0C0D reports that the supply of the motor A inverter is above its permitted range, while P0C0B stands for a lost or open supply and P0C0C for a supply that is too low. No manufacturer documents this code publicly. GM's tables for the sibling P0C0B show what the supply is: the gate-drive rails of the IGBT module, on eAssist a 5 V and a 15 V rail that are each watched against limits. A rail running too high stresses the driver stage and can falsify the switching of the power transistors. CARB requires hybrid components to be monitored for circuit faults. Expect the inverter to shut down or derate, with reduced or no electric drive.
- What you may notice
- Malfunction indicator lamp, hybrid system warning
- Reduced or no electric propulsion from motor A
- Engine runs more often or the vehicle enters limp mode
- Likely causes
- LikelyFaulty voltage regulation of the gate-drive supply inside the motor A inverter
- PossibleExcessive 12 V system voltage from the DC/DC converter or a 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.