P0C83Hybrid/EV Battery Temperature Sensor H Circuit Low
- 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
- P0C83 stands for a sensor H voltage under its permitted range, which with an NTC thermistor reads as heat: a short to ground or a shorted element makes the cell group seem far too hot. GM's 2016 Cadillac ELR table (16OBDG01) fails it above 87.5 °C, an ADC count below 680, for 1.4 s in a 2 s window, two trips; the Volt bulletin 18-NA-342 files it as the low-voltage fault of sensor 8. Mitsubishi's Outlander PHEV of 2018 reports a short of sensor [07] once the voltage sits below 0.12 V, beyond 125 °C, for 2 s, and points to the battery module or its cell monitoring unit. P0C84 is the matching high-voltage fault, P0C82 the plausibility test. Because the controller must assume a hot spot, it cuts power and may run the battery cooling hard.
- What you may notice
- Hybrid warning lamp and strong power reduction
- Live data shows sensor H far hotter than its neighbours
- Battery cooling running at full effort
- Likely causes
- LikelySensor H signal shorted to ground or to the pack housing
- PossibleShorted thermistor H
- RareFault in the cell monitoring unit that reads sensor H
- 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: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.