U063F

Lost Communication With Engine Coolant Flow Control Valve Position Sensor

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Unstable engine operation
Increased engine temperature
Reduced cooling system efficiency
Possible misfires

Causes

Valve position sensor malfunction
Open or short circuit in the circuit
Wiring harness damage
Corrosion or oxidation of contacts
Engine ECU malfunction

How to Fix

Check the integrity of the electrical circuit
Inspect and clean connector contacts
Test valve position sensor
Replace the faulty sensor if necessary
Check and replace wiring harness if necessary

Related codes

U063E U0640 U0641