P0CFF
Hybrid/EV Battery Pack Coolant Pump A Stuck/Stalled
Generic OBD-II
Common symptoms
What you'll notice
- Check the coolant pump for any physical damage or obstructions.
- Inspect the electrical connections and wiring related to the coolant pump.
- Test the functionality of the coolant pump by applying direct power
- Flush and replace the coolant in the hybrid/EV battery pack.
- If all previous steps fail, consider replacing the coolant pump with a new one.
Common causes
Most likely first
- The hybrid/EV battery pack coolant pump is faulty or malfunctioning.
- The coolant pump is clogged or blocked, preventing proper coolant flow.
- The coolant pump motor is not receiving power or is defective.
- There is a problem with the coolant pump control module or circuitry.
- The coolant pump relay is faulty or not functioning correctly.
How to diagnose & fix
Work through it in order
- Vehicle may experience a decrease in power or acceleration
- Warning light may illuminate on the dashboard
- Excessive heat or overheating in the battery pack
Read & clear P0CFF yourself
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