P0C10 code meaning
Drive Motor B Inverter Power Supply Circuit High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C10 means
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.
P0C10 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C10
- Malfunction indicator lamp, hybrid system warning
- Reduced propulsion, motor B unavailable
- Vehicle limited to engine or reduced-power operation
Common causes of P0C10
- Most 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
- Less likelySupply or sense line shorted to a higher voltage in the harness
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor b inverterWiring harnessHybrid control module
What each part of P0C10 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 10 | The exact fault in that area. |
What to do next
- Note P0C10 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C10
What does P0C10 mean?
P0C10 means "Drive Motor B Inverter Power Supply Circuit High". P0C10 flags a supply of the motor B inverter that is above its permitted range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C10?
Drive gently and only to a workshop. With P0C10 the car can go into limp mode (reduced power) to protect itself.
Will P0C10 fail an emissions test?
Yes, it can. P0C10 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C10 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P0C10 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.