P26B8

Engine Coolant Bypass Valve C Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Engine overheating
Insufficient engine warm-up in cold weather
Check Engine Light Illuminates
Unstable engine operation
Reduced cooling system efficiency

Causes

Coolant bypass valve malfunction
Open or short circuit in control circuit
Poor contact in connectors
Engine control unit malfunction
Corroded or damaged wiring

How to Fix

Check the condition of the coolant bypass valve
Inspect the control circuit for damage
Check connections and connectors
Test the engine control unit
Replace faulty components

Related codes

P26B7 P26B9 P26BA