OBD-II code · Powertrain (generic)
P0AC0 Hybrid Battery Cooling System Performance
The BMS detects insufficient cooling performance for the HV battery, where pack temperature rise during operation exceeds expected value despite active cooling.
Is it safe to drive with P0AC0?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCoolant pump failed
- PossibleBattery radiator clogged
Repair at a glance
- Difficulty
- Shop_only
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Battery Cooling System, Electric Coolant Pump, Battery Cooling Fan
Related codes
- P0ABDHybrid/EV Battery Pack Voltage Sense A Circuit High
- P0ABEHybrid/EV Battery Pack Voltage Sense A Circuit Intermittent/Erratic
- P0ABFHybrid/EV Battery Pack Current Sensor A Circuit
- P0AC1Hybrid/EV Battery Pack Current Sensor A Circuit Low
- P0AC2Hybrid/EV Battery Pack Current Sensor A Circuit High
- P0AC3Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.