P0C04 code meaning
Drive Motor B Current High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C04 means
P0C04 is the overcurrent check of drive motor B and protects the IGBTs of its inverter. GM flags it when the highest phase current exceeds 725 A on the 2011 Volt or 600 A on the 2012 two-mode trucks and in the 2016 to 2019 hybrid tables; the newer tables also fail a d-axis current below a stator-temperature curve of roughly -556 to -315 A. Fast and slow counters cover sudden and intermittent peaks, Type A, one trip. Stellantis names P0C04 with P0C01 on the 2026 Jeep Wagoneer S and Cherokee: cross-threaded or loose bolts on the three-phase cables between transmission and drive motor power inverter, checked by resistance against a 29 to 32 milliohm window. The car goes into limp mode with the MIL on.
P0C04 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 P0C04
- Limp mode with red wrench or malfunction lamp
- Sudden loss of electric drive power
Common causes of P0C04
- Most likelyCross-threaded or loose three-phase cable bolts with metal debris (Stellantis S2608000006)
- PossibleShorted or damaged stator winding of motor B
- Less likelyFailing power switch or current measurement in the motor B inverter
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor bDrive motor b inverter
What each part of P0C04 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. |
| 04 | The exact fault in that area. |
What to do next
- Note P0C04 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 P0C04
What does P0C04 mean?
P0C04 means "Drive Motor B Current High". P0C04 is the overcurrent check of drive motor B and protects the IGBTs of its inverter. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C04?
Drive gently and only to a workshop. With P0C04 the car can go into limp mode (reduced power) to protect itself.
Will P0C04 fail an emissions test?
Yes, it can. P0C04 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 P0C04 to fix?
Difficulty: workshop only. A typical repair takes 1 to 10 hours of work. This is a job for a workshop.
Will P0C04 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.