Charge Air Cooler Coolant Pump A Control Circuit Low

Where it lives

For P023B, the pump sits on the circuit this code reports. The description of P023B reports a fault at the pump.

Check these first

• A short to ground on the pump A control circuit
• A failed charge air cooler coolant pump A
• A corroded pump A connector
• A stuck or seized pump A
• A faulty ECM driver for pump A

What to do next

1. Command the charge air cooler coolant pump A on with a scan tool
2. Test the pump A control circuit for a short to ground
3. Inspect the pump A connector and wiring
4. Check the pump A for sticking or seizing
5. Replace the charge air cooler coolant pump A if the circuit is shorted
6. Clear the code and retest

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