P2B2A
Hybrid/EV Electronics Coolant Pump A Overspeed - Dry Run
The hybrid control module detects that the power electronics coolant pump A is running above the calibrated maximum speed without load. Indicates dry running due to coolant loss or air ingestion.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Coolant loss in electronics loopCommon
- Air drawn into pump suctionPossible
Parts involved
- Hybrid Electronics Coolant Pump A
- Power Electronics Coolant Loop
P2B2A is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.