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P0405

Overview

Code

P0405

Code Type

P

Code Class

P0

System

Engine, Emissions

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0405 indicates low input from the EGR position sensor

Symptoms

Check Engine Light illuminated; Rough idle

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 valve feedback control and emissions regulation

Possible Causes

Wiring short to ground; Faulty EGR position sensor; EGR valve issues

Diagnostic Steps

1 Inspect sensor wiring for shorts; 2 Test sensor voltage; 3 Inspect EGR valve operation; 4 Replace sensor if needed

Drive Safety Notes

Driving is possible but EGR function is impaired

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