P0C06Drive Motor A Phase U-V-W Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C06 belongs to the phase circuit group of drive motor A and reports that a U, V or W phase line sits too low, typically a short to the negative high-voltage rail or to chassis ground. P0C05 covers an open or missing phase, P0C07 the opposite high state. No manufacturer documents P0C06 for a drive motor publicly; GM's hybrid tables use only P0C05 from this trio. CARB requires hybrid input and output components to be monitored for circuit faults. Such a short usually also trips the inverter's overcurrent protection, so P0C01 or insulation faults may appear alongside. The motor controller shuts down motor A, which leaves the driver with reduced or no electric drive and a warning lamp.
- What you may notice
- Electric drive shut down with warning lamp
- Overcurrent or insulation codes stored at the same time
- Likely causes
- PossiblePhase cable or winding shorted to ground or housing
- PossibleShorted low-side power switch in the motor A inverter
- RareInsulation damage from heat, moisture or chafing
- 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: €200 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.