U3575

Coolant Mixing Valve Position Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect engine temperature
Insufficient interior heating
Engine overheating
Check Engine Light Is On
Reduced cooling system efficiency

Causes

Valve position sensor malfunction
Open or short circuit in the circuit
Poor contact in connectors
Mechanical valve failure
Problems with ECU software

How to Fix

Check the integrity of the sensor circuit
Check contacts in connectors
Check the mechanical operation of the valve
Replace position sensor if necessary
Update ECU software if necessary

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