P26A4

Engine Coolant Bypass Valve A Position Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine temperature
Engine overheating
Increased fuel consumption
Check Engine Light Is On
Reduced engine power

Causes

Open or short circuit in the sensor circuit
Valve position sensor malfunction
Connector problems or corrosion
Mechanical valve failure
Problems with the engine control unit

How to Fix

Check the integrity of wiring and connectors
Test valve position sensor
Check the mechanical operation of the valve
Clean or replace connectors if necessary
Replace the position sensor if it is faulty

Related codes

P26A5 P26A6 P26A3