OBD-II code · Powertrain (generic)
P0C45 Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit High
The ECM detects a high fault on the hybrid/ev battery pack coolant temperature sensor a circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0C45?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen sensor
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Coolant Temp Sensor A, Wiring Harness, Bms
Related codes
- P0CD8Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit High
- P0C42Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit
- P0C43Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Range/Performance
- P0C44Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Low
- P0C46Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Intermittent/Erratic
- P0C47Hybrid/EV Battery Pack Coolant Pump A Control Circuit/Open
- P0C48Hybrid/EV Battery Pack Coolant Pump A Control Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.