P2C49

Coolant Pump D Control Circuit Performance/Stuck Off

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Engine overheating in certain operating modes
Check Engine Light Is On
Uneven heating of individual engine zones
Reduced cooling system efficiency
Noise or hum from the coolant pump

Causes

Open or short circuit in the pump control circuit
Pump solenoid valve malfunction
Pump rotor jamming
Pump control relay problems
Corroded contacts or damaged wiring harness

How to Fix

Check the fuses and relays of the pump control circuit
Diagnose the control circuit (resistance, voltage)
Check the functionality of the coolant pump
Replace faulty pump or control circuit components
Clean connection contacts and eliminate possible corrosion