P0403
Medium SeverityEGR 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
- β οΈCheck engine light
- β οΈEGR not functioning
- β οΈPossible rough idle
Common Causes
Failed EGR solenoidlikely
Wiring issuepossible
Failed EGR valve motorpossible
How to Diagnose P0403
- 1Check EGR connector
- 2Test solenoid/motor
- 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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