Powertrain, generic · Hybrid propulsion

P0C83 Hybrid/EV Battery Temperature Sensor H Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

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.

Likely causes

Sensor H signal shorted to ground or to the pack housing

Shorted thermistor H

Fault in the cell monitoring unit that reads sensor H

Symptoms

Hybrid warning lamp and strong power reduction
Live data shows sensor H far hotter than its neighbours
Battery cooling running at full effort

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–2,500

Time1–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery temp sensor hwiring harnessbms

References: gsi.ext.gm.com, static.nhtsa.gov, mitsubishitechinfo.com.