P0C0CDrive Motor A Inverter Power Supply Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C0C reports that the supply voltage of the motor A inverter is present but too low, while P0C0B covers a lost or open supply and P0C0D a supply that is too high. Which supply is meant depends on the maker: GM ties its sibling P0C0B to the gate-drive supply of the IGBTs, Mercedes to the high-voltage feed. Audi documents P0C0C on the 2025 and 2026 A6 and Q6 e-tron family: stored in the electric drive modules together with P0E8D, it comes with a red high-voltage fault warning to stop safely, and the bulletin calls for replacing the affected front or rear power electronics. CARB requires circuit monitoring of hybrid components. Without a stable supply the inverter cannot switch, so drive power is cut.
- What you may notice
- Red high-voltage system warning asking to stop safely
- Loss of drive power or vehicle will not get ready to drive
- Likely causes
- LikelyInternal fault of the drive power electronics (Audi TSB 2081725)
- PossibleWeak 12 V supply, poor ground or high-resistance connector at the inverter
- RareWeak 12 V battery or DC/DC converter output
- 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 – €7,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.