P0C11Drive Motor A Inverter Phase U Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C11 is a protective code: the temperature sensor at phase U of the motor A inverter reads a valid but excessive value. GM uses it across its hybrids. The 2011 Volt reads PIM sensor A against 98 °C, the 2012 two-mode trucks against 88 °C with a reset at 85 °C, both Type A; the 2016 Volt sets it above 126 °C for 1.2 s within 2 s, the 2019 table above 128 °C, Type A, one trip. On eAssist the single inverter code P0C11 sets above 118.2 °C as Type B, two trips. Sensor faults such as P0AEE block it. Phase V and W are P0C12 and P0C13. GM advises finding the cause of poor cooling. The inverter cuts power to protect itself.
- What you may notice
- Malfunction indicator lamp, often with a hybrid system overheat message
- Reduced propulsion power until the inverter cools down
- Electric drive unavailable, engine runs continuously
- Likely causes
- LikelyLow coolant level or air in the power electronics cooling loop
- LikelyFailed or weak electric coolant pump of the inverter loop
- PossibleClogged power electronics radiator or inoperative cooling fan
- RareSustained heavy load such as towing uphill in high ambient heat
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.