P26FB

EGR Cooler Bypass Control Stuck Closed Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Increased fuel consumption
Reduced engine power
Increased NOx emissions
Check Engine Light Is On
EGR cooler overheating

Causes

Bypass valve jammed
Control solenoid valve malfunction
Open or short circuit in control circuit
Mechanical damage to the valve
EGR system contamination

How to Fix

Check the operation of the bypass valve manually
Diagnose the valve control circuit
Check control solenoid valve
Clean or replace bypass valve
Check the operation of the entire EGR system

Related codes

P26FA P26FC P0401