P0C32Hybrid/EV Battery Cooling System A 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
- P0C32 is the functional check of the battery thermal system that CARB asks for. GM tunes it per vehicle: the 2012 Volt (12OBDG01A) fails it when the average pack temperature stays above 40 °C in active cooling or below −17 °C in active heating, after 4200 s or 9000 s, Type A, one trip. The Two-Mode trucks (12OBDG06) compare the hottest module with a limit that rises with inlet temperature, from 45 °C to about 65 °C, Type B. The air-cooled eAssist (13OBDG05C) models the power pack temperature after six hours off and fails above 15 °C deviation, Type B. GM bulletin PIP4992C links P0C32 on 2012–2016 eAssist cars to a pack fan that stops at low 12 V voltage and calls for reprogramming and fan replacement. B and C circuits use P2D3F and P2D40.
- What you may notice
- MIL and hybrid system warning
- Reduced electric range or assist
- Charging system or battery warning message (eAssist)
- Likely causes
- LikelyBattery cooling fan stopping at low 12 V system voltage (GM eAssist)
- PossibleLow coolant, air or a weak pump in a liquid-cooled pack circuit
- PossibleBlocked cooling air intake or ducts of an air-cooled pack
- RareFailed pack heater or chiller valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.