OBD Guide
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P1408

EGR Flow Out Of Self Test Range

P1408 is an OBD-II diagnostic trouble code meaning: EGR Flow Out Of Self Test Range. Common causes: dirty or faulty egr valve, problems with the egr valve electrical circuit. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Detonation (engine knocking)

Causes

  • Dirty or faulty EGR valve
  • Problems with the EGR valve electrical circuit
  • EGR valve position sensor malfunction
  • Leaks in the EGR system
  • Software error in the engine control unit

How to Fix

  1. Check the condition of the EGR valve for contamination
  2. Check the electrical circuit of the EGR valve
  3. Check EGR valve position sensor
  4. Scan the system for other related errors
  5. Clean or replace EGR valve if necessary

Related codes

P0401P0404P0405

Error P1408 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCJaguarLincolnMazdaMercuryOldsmobilePlymouthPontiacSaturnSuzukiVolkswagen

FAQ

What does the P1408 code mean?

P1408 is an OBD-II diagnostic trouble code that indicates: EGR Flow Out Of Self Test Range

What causes a P1408 error code?

The most common causes of P1408 include: Dirty or faulty EGR valve; Problems with the EGR valve electrical circuit; EGR valve position sensor malfunction; Leaks in the EGR system.

How do I fix a P1408 diagnostic trouble code?

To fix P1408: Check the condition of the EGR valve for contamination. Check the electrical circuit of the EGR valve. Check EGR valve position sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1408?

Yes, but get it checked soon

How much does it cost to fix P1408?

The estimated repair cost for P1408 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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