P0C7BGenerator Inverter Voltage Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0C7B sets when the inverter of the generator, the motor-generator the engine drives to make electricity, sees DC voltage above its limit. Mitsubishi is the only maker found documenting the code by number: in the 2018 Outlander PHEV the generator control unit trips a hardware high-voltage switch at 370 V, and one occurrence with the power stage running, or 0.5 s with it switched off, is enough. The manual suspects the high-voltage wiring as a whole or the generator control unit, and first asks to rule out other voltage codes and to check the tightening torque of the front battery cable at the power drive unit. Overvoltage while generating may also follow a contactor opening under load or false sensing. Expect a warning lamp and limited hybrid operation.
- What you may notice
- Hybrid or EV warning lamp
- Engine-driven charging or hybrid drive restricted
- Likely causes
- PossibleFront battery cable at the power drive unit not at specified torque
- PossibleGenerator control unit or its voltage detection faulty
- RareVoltage spike when a contactor opens while the generator charges
- 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 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.