P0C07 code meaning
Drive Motor A Phase U-V-W Circuit High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C07 means
P0C07 is the high member of the drive motor A phase circuit group: a U, V or W phase line reads higher than it should, most likely through a short to the positive high-voltage rail or a power switch that stays on. Its siblings are P0C05 for an open phase and P0C06 for a phase pulled low. No manufacturer documents P0C07 publicly; among these three, GM uses only P0C05, which watches for missing phase current. CARB requires circuit monitoring of hybrid input and output components. Because a stuck high phase drives uncontrolled current, the inverter normally disables motor A at once. The driver sees a warning lamp and loses some or all electric propulsion until the shorted part is replaced.
P0C07 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 10 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C07
- Immediate shutdown of electric drive with warning lamp
- Reduced performance or engine-only operation
Common causes of P0C07
- PossibleShorted high-side power switch in the motor A inverter
- PossiblePhase cable shorted to the positive high-voltage path
- Less likelyFaulty gate driver holding a switch on
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor a phase uvwDrive motor a inverter
What each part of P0C07 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. |
| 07 | The exact fault in that area. |
What to do next
- Note P0C07 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 P0C07
What does P0C07 mean?
P0C07 means "Drive Motor A Phase U-V-W Circuit High". P0C07 is the high member of the drive motor A phase circuit group: a U, V or W phase line reads higher than it should, most likely through a short to the positive high-voltage rail or a power switch that stays on. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C07?
Drive gently and only to a workshop. With P0C07 the car can go into limp mode (reduced power) to protect itself.
Will P0C07 fail an emissions test?
Yes, it can. P0C07 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 P0C07 to fix?
Difficulty: workshop only. A typical repair takes 1 to 10 hours of work. This is a job for a workshop.
Will P0C07 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.