P26AD

Engine Coolant Bypass Valve B 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
Unstable engine operation
Check Engine light comes on
Reduced cooling system efficiency

Causes

Cooling system valve B 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 valve B of the cooling system
Check the continuity and resistance of the control circuit
Inspect connectors and contacts for corrosion or damage
Check the operation of the engine control unit
Replace faulty components

Related codes

P26AE P26AC P26AF