OBD Guide

P26C5

Exhaust Flow Control Valve A Control Circuit/Open

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine power
  • Deteriorating fuel economy
  • Unstable operation at idle
  • Possible problems with the EGR system

Causes

  • Open or short circuit in wiring harness
  • Exhaust gas flow control valve malfunction
  • Relay or fuse problems
  • Poor contact in connectors
  • Malfunction of the engine control unit (rare)

How to Fix

  1. Check the fuse and relay associated with the valve
  2. Inspect the wiring harness for damage
  3. Check valve resistance and operation
  4. Clean or replace connectors if necessary
  5. Replace the exhaust gas flow control valve if it is faulty

Related codes

Error P26C5 by Vehicle Brand