Coolant Pump C Control Circuit Performance/Stuck Off

Where it lives

For P2C48, the part to look at first is the pump named here.

Check these first

• A coolant pump C that does not turn when commanded
• Air in the coolant system at pump C
• An intermittent power supply to pump C
• A pump C impeller worn or slipping

What to do next

1. Command coolant pump C on a scan tool
2. Bleed the coolant system of air
3. Check the pump C power and ground
4. Watch pump C speed against the commanded value
5. Replace coolant pump C if it will not track
6. Clear the code and retest

Look up another code