Coolant Pump A Control Module Overtemperature

Where it lives

For P2B9E, the description names the pump as the part involved.

Check these first

• Low coolant flow letting the coolant pump A control module overheat
• A failing coolant pump A drawing excess current
• Air trapped in the coolant loop around pump A
• A blocked or kinked coolant hose feeding pump A

What to do next

1. Scan all modules and read the coolant pump A temperature and current
2. Check the coolant level and bleed air from the loop
3. Inspect the coolant hoses and loop for a blockage or kink
4. Measure coolant pump A current draw against spec
5. Replace coolant pump A if it overheats with a clear loop and full coolant
6. Clear the code and retest

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