Powertrain
Definition only
Lights the check engine lamp
P2DFC: Hybrid/EV Battery Coolant Leak Detected
Standardized SAE J2012 code · P2Dxx codes
What does P2DFC mean?
The hybrid control module detects a coolant leak in the HV battery thermal loop. Coolant level dropping or leak sensor triggered.
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 Coolant fitting loose or cracked
- Medium Coolant hose split
- 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 P2DFC on the same make and model first.
P2DFC in the community
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