OBD-II code · Powertrain (generic, extended)
P2CF6 Hybrid/EV Battery Pack Coolant Pump B Overspeed /Air in System
The HV battery pack coolant pump B reports a overspeed /air in system condition. Battery thermal management may be impaired.
Is it safe to drive with P2CF6?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyAir pocket in coolant loop
- PossibleCoolant level low
- Less likelyPack cell imbalance approaching service threshold
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
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Battery Coolant Pump B, Battery Pack Coolant Loop
Related codes
- P2CF3Hybrid/EV Battery Pack Coolant Pump A Underspeed
- P2CF4Hybrid/EV Battery Pack Coolant Pump B Supply Voltage Circuit
- P2CF5Hybrid/EV Battery Pack Coolant Pump B Stuck/Stalled
- P2CF7Hybrid/EV Battery Pack Coolant Pump B Underspeed
- P2CF8Engine Coolant Bypass Valve D Control Circuit Driver Current/Temperature Too High
- P2CF9Belt Integrated Starter Generator Belt Tensioner Control Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.