Hybrid/EV Electronics Coolant Pump A Overspeed

Where it lives

For P2C67, the description names the pump as the part involved.

Check these first

• A coolant pump A running faster than commanded
• A pump A speed signal that reads high
• Air in the electronics coolant loop
• A pump A driver fault in the control module

What to do next

1. Read hybrid electronics coolant pump A speed on a scan tool
2. Compare pump A speed to the commanded value
3. Bleed air from the electronics coolant loop
4. Check the pump A connector and wiring
5. Replace electronics coolant pump A if it runs away
6. Clear the code and retest

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