OBD Guide

P26FB

EGR Cooler Bypass Control Stuck Closed Bank 1

P26FB is an OBD-II diagnostic trouble code meaning: EGR Cooler Bypass Control Stuck Closed Bank 1. Common causes: bypass valve jammed, control solenoid valve malfunction. Estimated repair cost: $17–89.

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

  1. Check the operation of the bypass valve manually
  2. Diagnose the valve control circuit
  3. Check control solenoid valve
  4. Clean or replace bypass valve
  5. Check the operation of the entire EGR system

Related codes

Error P26FB by Vehicle Brand

FAQ

What does the P26FB code mean?

P26FB is an OBD-II diagnostic trouble code that indicates: EGR Cooler Bypass Control Stuck Closed Bank 1

What causes a P26FB error code?

The most common causes of P26FB include: Bypass valve jammed; Control solenoid valve malfunction; Open or short circuit in control circuit; Mechanical damage to the valve.

How do I fix a P26FB diagnostic trouble code?

To fix P26FB: Check the operation of the bypass valve manually. Diagnose the valve control circuit. Check control solenoid valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P26FB?

Yes, but get it checked soon

How much does it cost to fix P26FB?

The estimated repair cost for P26FB is $17–89. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat