Powertrain
generic / SAE
P2B29
Hybrid/EV Battery Pack Coolant Pump A Overspeed - Dry Run
The hybrid control module detects that battery pack coolant pump A is running above the calibrated maximum speed without load. Indicates dry running due to coolant loss or air ingestion.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / 29
Possible causes
- Coolant loss in battery loop high
- Air drawn into pump suction medium
- Pack cell imbalance approaching service threshold low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–6 h
- Component: hybrid battery coolant pump a
- Component: battery pack coolant loop
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012