P0C04Drive Motor B Current High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Limp mode with red wrench or malfunction lamp
- Sudden loss of electric drive power
- Likely causes
- LikelyCross-threaded or loose three-phase cable bolts with metal debris (Stellantis S2608000006)
- PossibleShorted or damaged stator winding of motor B
- RareFailing power switch or current measurement in the motor B inverter
- 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 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.