Powertrain
Definition only
Lights the check engine lamp
P2CF7: Hybrid/EV Battery Pack Coolant Pump B Underspeed
Standardized SAE J2012 code · P2Cxx codes
What does P2CF7 mean?
The HV battery pack coolant pump B reports a underspeed condition. Battery thermal management may be impaired.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
- High Mechanical load increased
- Medium Supply voltage low under load
- Low Pack cell imbalance approaching service threshold
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2CF7 on the same make and model first.
P2CF7 in the community
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