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P0408

Overview

Code

P0408

Code Type

P

Code Class

P0

System

Emissions

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0408 indicates high input from the EGR position sensor circuit

Symptoms

Engine misfire; Poor throttle response

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

EGR feedback control

Possible Causes

Short to voltage

Diagnostic Steps

1 Inspect EGR wiring 2 Test sensor voltage

Drive Safety Notes

EGR flow may be excessive

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