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P0403

Medium Severity

EGR Control Circuit

Emissions System

What Does P0403 Mean?

The EGR valve control solenoid or motor has a circuit fault.

Common Fix

Replace EGR valve or solenoid

Estimated Cost (DIY)

$30 - $200

Symptoms

  • ⚠️Check engine light
  • ⚠️EGR not functioning
  • ⚠️Possible rough idle

Common Causes

Failed EGR solenoidlikely
Wiring issuepossible
Failed EGR valve motorpossible

How to Diagnose P0403

  1. 1Check EGR connector
  2. 2Test solenoid/motor
  3. 3Check wiring

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Frequently Asked Questions

Is the EGR solenoid part of the valve?
On modern vehicles, the solenoid is usually integrated into the EGR valve assembly.
How much is an EGR valve?
EGR valves cost $30-$200 depending on the vehicle. Electronic EGR valves cost more than vacuum-operated ones.

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