P0C7B code meaning
Generator Inverter Voltage Too High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C7B means
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.
P0C7B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C7B
- Hybrid or EV warning lamp
- Engine-driven charging or hybrid drive restricted
Common causes of P0C7B
- PossibleFront battery cable at the power drive unit not at specified torque
- PossibleGenerator control unit or its voltage detection faulty
- Less likelyVoltage spike when a contactor opens while the generator charges
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator inverterDc link capacitor
What each part of P0C7B 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. |
| 7B | The exact fault in that area. |
What to do next
- Note P0C7B 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 P0C7B
What does P0C7B mean?
P0C7B means "Generator Inverter Voltage Too High". P0C7B sets when the inverter of the generator, the motor-generator the engine drives to make electricity, sees DC voltage above its limit. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C7B?
Drive gently and only to a workshop. With P0C7B the car can go into limp mode (reduced power) to protect itself.
Will P0C7B fail an emissions test?
Yes, it can. P0C7B 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 P0C7B to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P0C7B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.