P0C82Hybrid/EV Battery Temperature Sensor H Circuit Range/Performance
- 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
- 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.
- What you may notice
- Check-engine or hybrid lamp, often after the car has stood for a while
- Battery power limited
- Likely causes
- 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)
- RareGenuine local temperature difference from poor coolant flow
- 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: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.