Useful checks before replacing parts
- Review pump command, feedback voltage, relay or driver state, inverter temperature, coolant temperature, freeze-frame data, and charging voltage.
- Inspect for short-to-voltage faults, open grounds, stuck relay contacts, backfed pump wiring, connector corrosion, and control module driver faults.
- Verify whether the pump circuit stays high when not commanded and whether pump operation matches the controller request.
Related OBD-II codes
These nearby hybrid / ev entries can help compare wording and fault area. They may share the same verification status as the source database.