Hybrid/EV Battery Pack Coolant Pump A Control Circuit Driver Current/Temperature Too High

Where it lives

For P0E1F, the circuit described runs through the pump. The description of P0E1F reports a fault at the pump.

Check these first

• A pump A that draws too much current and heats its driver
• A binding or failing pump A motor
• A shorted pump A winding
• A restricted coolant loop loading pump A

What to do next

1. Read the pump A driver current and temperature on a scan tool
2. Command pump A and listen for bearing noise
3. Check the coolant loop for restriction
4. Measure pump A motor current
5. Replace the pump A motor if current stays high
6. Clear the code and retest

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