P2DF4

Coolant Pump E Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–133 (est.)

Symptoms

Engine overheating
Unstable operation of the cooling system
Check Engine Light Is On
Reduced interior heating efficiency
Incorrect coolant temperature readings

Causes

Broken wires in the pump control circuit
Coolant pump relay malfunction
The pump motor has failed
Pump connector connection problems
Malfunction of the engine control unit (rare)

How to Fix

Check the integrity of the wiring and connections of the pump
Check the functionality of the pump relay
Check the pump motor for resistance
Check power and ground at the pump connector
If necessary, replace the coolant pump

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