P0E80

Coolant Bypass Valve B Control Stuck Closed

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Engine overheating
Unstable engine temperature
Extended warm-up time
Check Engine light comes on
Reduced interior heating efficiency

Causes

Valve mechanism jammed
Valve actuator malfunction
Problems with wiring to the valve
Cooling system contamination
Engine control unit malfunction

How to Fix

Check the condition of the coolant valve
Clean or replace a stuck valve
Check electrical wiring and connectors
Check the operation of the electric valve actuator
If necessary, replace the coolant valve

Related codes

P0E81 P0E82 P0E83