Charge Air Cooler Coolant Pump A Performance

Where it lives

For P026E, the description names the pump as the part involved.

Check these first

• Coolant pump A running weak or not at all
• A failing pump A motor or solenoid
• A wiring or connector fault at pump A
• Air or low coolant in the charge air cooler loop
• A pump A command signal that never arrives

What to do next

1. Read pump A commanded versus actual speed
2. Check coolant level and bleed the charge cooler loop
3. Inspect the pump A connector and wiring
4. Command pump A on with a scan tool and listen
5. Replace coolant pump A if it stays weak
6. Clear the code and retest

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