P0E7C

Coolant Bypass Valve B Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–67 (est.)

Symptoms

Check Engine Light Is On
Unstable engine operation at idle
Problems with engine warming up
Reduced cooling system efficiency
Possible errors in engine temperature

Causes

Open or short circuit in valve control circuit
Oxidation of contacts in connectors
Bypass valve B fault
Problems with the relay or circuit fuse
Engine control unit malfunction

How to Fix

Check the integrity of the wiring and connectors of the control circuit
Check resistance of bypass valve B
Check the voltage at the valve connector with the ignition on
If necessary, replace bypass valve B
Reset the error and check if it appears again

Related codes

P0E7B P0E7D P0597