P0C82 code meaning
Hybrid/EV Battery Temperature Sensor H Circuit Range/Performance
Powertrain system Generic code P0Cxx codes Check engine light
What P0C82 means
P0C82 is the plausibility test for sensor H: its circuit is fine, but the temperature it reports strays too far from what the rest of the pack says. On the 2016 Cadillac ELR (16OBDG01) GM fails it when the reading differs from the average of the other module groups by more than 20 °C in 50 of 67 samples, Type B; the 2019 table 19OBDG02 allows 25 °C, sampled every 25 ms and only while no low, high or communication fault is active. Mitsubishi files it under sensor [07] in the Outlander PHEV and checks once per drive after an hour of soak against a 13 °C limit. GM bulletin 18-NA-342 names it sensor 8 performance and treats false sets on the Volt with reprogramming. A sensor that came loose from its cells or slowly drifted is the typical real cause.
P0C82 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C82
- Check-engine or hybrid lamp, often after the car has stood for a while
- Battery power limited
Common causes of P0C82
- Most likelyThermistor H reading off while still electrically valid
- PossibleSensor H lifted off its module, measuring air instead of cells
- PossibleOutdated battery module software (GM Volt, 18-NA-342)
- Less likelyGenuine local temperature difference from poor coolant flow
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 hWiring harnessBms
What each part of P0C82 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. |
| 82 | The exact fault in that area. |
What to do next
- Note P0C82 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 P0C82
What does P0C82 mean?
P0C82 means "Hybrid/EV Battery Temperature Sensor H Circuit Range/Performance". P0C82 is the plausibility test for sensor H: its circuit is fine, but the temperature it reports strays too far from what the rest of the pack says. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C82?
Drive gently and only to a workshop. With P0C82 the car can go into limp mode (reduced power) to protect itself.
Will P0C82 fail an emissions test?
Yes, it can. P0C82 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 P0C82 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0C82 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.