P0C80 code meaning
Hybrid/EV Battery Temperature Sensor G Circuit Intermittent/Erratic
Powertrain system Generic code P0Cxx codes Check engine light
What P0C80 means
P0C80 catches a sensor G signal that jumps around instead of following the slow thermal drift of a large battery. GM spells out the logic in its hybrid tables 18OBDG02 and 19OBDG02: every 100 ms the module sums the absolute changes of the reading across a 10-sample window, a total above 10 fails that window, and 4 failed windows out of 5 set the code as Type B, two trips, provided system voltage exceeds 10.2 V and the battery interface module is communicating. Mitsubishi's Outlander PHEV has no erratic code for this sensor. The value stays inside its valid range, which separates P0C80 from P0C7E and P0C7F; a loose terminal or a cracked conductor is the usual reason. When several sensors on one board jump together, suspect the board or its supply.
P0C80 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C80
- Warning lamp that may come and go between trips
- Jumping sensor G value in live data
- Occasional power reduction
Common causes of P0C80
- Most likelyLoose or fretting terminal in the sensor G connector
- PossibleConductor cracked inside the insulation, breaking under vibration
- Less likelyCell monitoring board with unstable reference or ground
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery temp sensor gWiring harnessBms
What each part of P0C80 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. |
| 80 | The exact fault in that area. |
What to do next
- Note P0C80 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 P0C80
What does P0C80 mean?
P0C80 means "Hybrid/EV Battery Temperature Sensor G Circuit Intermittent/Erratic". P0C80 catches a sensor G signal that jumps around instead of following the slow thermal drift of a large battery. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C80?
Drive gently and only to a workshop. With P0C80 the car can go into limp mode (reduced power) to protect itself.
Will P0C80 fail an emissions test?
Yes, it can. P0C80 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 P0C80 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0C80 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.