OBD-II code · Powertrain (generic)
P0C4C Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit Low
The HV battery pack coolant pump A reports a supply voltage circuit low condition. Battery thermal management may be impaired.
Is it safe to drive with P0C4C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply wire shorted to ground
- PossibleSupply rail collapsed
- 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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Coolant Pump A, Wiring Harness, Bms
Related codes
- P0C49Hybrid/EV Battery Pack Coolant Pump A Control Circuit High
- P0C4AHybrid/EV Battery Pack Coolant Pump A Control Performance
- P0C4BHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit/Open
- P0C4DHybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit High
- P0C4EDrive Motor A Position Exceeded Learning Limit
- P0C4FDrive Motor B Position Exceeded Learning Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.