Motor Electronics Coolant Pump A Overspeed/Air in System

Where it lives

For P2D01, start at the pump the description names.

Check these first

• Air trapped in the motor electronics coolant loop
• A low motor electronics coolant level
• A failed coolant pump A speed sensor
• Coolant pump A running dry
• A restriction in the motor electronics coolant flow

What to do next

1. Check the motor electronics coolant level and bleed the loop
2. Verify coolant pump A speed on a scan tool
3. Inspect the coolant pump A inlet for air
4. Vacuum fill the motor electronics cooling system
5. Replace coolant pump A if the overspeed returns
6. Clear the code and retest

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