P26BD

Engine Coolant Bypass Valve D Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Engine overheating
Insufficient engine warm-up
Unstable engine operation
Check Engine Light Is On
Loss of engine power

Causes

Open or short circuit in valve control circuit
Coolant bypass valve malfunction
Problems with the relay or circuit fuse
Engine control unit malfunction
Corrosion or poor contact in connectors

How to Fix

Check the integrity of the wiring and connectors of the control circuit
Check the resistance and operation of the bypass valve
Check voltage at valve connectors
If necessary, replace the bypass valve
Scan the control unit for additional errors

Related codes

P26BE P26BF P26BC