P26BA

Engine Coolant Bypass Valve C Stuck/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine temperature
Poor interior heating
Extended engine warm-up time
Check Engine Light Illuminates
Reduced cooling system efficiency

Causes

Mechanical valve jamming
Deposits in the cooling system
Valve corrosion
Open circuit control
Solenoid valve malfunction

How to Fix

Check the condition of the coolant
Clean or replace bypass valve
Check valve control circuit
Check the operation of the solenoid valve
Replace valve assembly if necessary

Related codes

P26BB P26BC P26BD