U0617

Lost Communication With Engine Coolant Bypass Valve C

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Deterioration of the cooling system
Possible engine overheating
Reduced engine power
Increased fuel consumption

Causes

Open or short circuit in valve circuit
Coolant bypass valve malfunction
Problems with the wiring harness or connectors
Engine ECU malfunction
Corrosion of contacts or connectors

How to Fix

Check the integrity of the bypass valve circuit
Check the condition of the connectors and wiring harness
Test valve resistance
Replace faulty bypass valve if necessary
Reset the error code and check the system

Related codes

U0615 U0616 U0618