Hybrid/EV Battery Pack Coolant Pump A Control Circuit High

Where it lives

For P0C49, the circuit described runs through the pump. The description of P0C49 reports a fault at the pump.

Check these first

• A battery pack coolant pump A control voltage above its normal range
• A short to voltage in the pump A control circuit
• Corrosion or water in the pump A control connector
• A failed battery pack coolant pump A

What to do next

1. Read battery pack coolant pump A control voltage on a scan tool
2. Test the pump A control circuit for a short to voltage
3. Inspect the pump A control connector for corrosion or water
4. Check the battery pack coolant level and type
5. Replace battery pack coolant pump A if the circuit tests good
6. Clear the code and retest

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