P2CC5 code meaning
Generator Inverter Power Supply B Circuit/Open
Powertrain system Generic code P2Cxx codes Check engine light
What P2CC5 means
P2CC5 concerns supply B inside the inverter that drives a hybrid's generator (motor-generator), typically a low-voltage rail feeding the gate drivers of the power transistors. Which supply gets the letter B is defined by the manufacturer; a second inverter channel or second generator would also fit. The code covers a missing supply or an interrupted feed. No manufacturer documents P2CC5 publicly. GM's 2019 hybrid tables show the principle with P0C0B for the drive motor A inverter: the IGBT module flags a bias fault when its supply dips below a threshold, and 0.168 s of failures within a 0.2 s window set a Type A code. CARB requires circuit monitoring of hybrid components. Without gate supply the generator cannot be switched at all. Supply A: P0E0F.
P2CC5 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2CC5
- Hybrid system warning light and MIL on
- Generator out of operation, vehicle may not become ready to drive
Common causes of P2CC5
- PossibleSupply B for the gate drivers failed inside the inverter
- Possible12 V feed, fuse or connector of the inverter interrupted
- Less likelyPoor ground connection of the inverter control electronics
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator inverter bWiring harnessHybrid control module
What each part of P2CC5 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| C5 | The exact fault in that area. |
What to do next
- Note P2CC5 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 P2CC5
What does P2CC5 mean?
P2CC5 means "Generator Inverter Power Supply B Circuit/Open". P2CC5 concerns supply B inside the inverter that drives a hybrid's generator (motor-generator), typically a low-voltage rail feeding the gate drivers of the power transistors. It is a generic code, so it means the same on every make.
Is it safe to drive with P2CC5?
Drive gently and only to a workshop. With P2CC5 the car can go into limp mode (reduced power) to protect itself.
Will P2CC5 fail an emissions test?
Yes, it can. P2CC5 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 P2CC5 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2CC5 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.