P0404Medium urgency
EGR Circuit Range/Performance
Emission · EGR System
⚠️ Safe to drive — fix before emissions test.
What this means
The EGR valve position sensor reports the valve is not moving to the commanded position.
Likely causes
- Carbon-clogged EGR valveMost common
- Failed EGR valve position sensorCommon
- EGR vacuum solenoid failureCommon
Estimated repair cost
EGR valve replace$200 – $500
EGR cleaning service$100 – $250
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Frequently asked questions about P0404
What does P0404 mean?
The EGR valve position sensor reports the valve is not moving to the commanded position.
Is P0404 serious?
Safe to drive — fix before emissions test.
How much does it cost to fix P0404?
Repair costs for P0404 range from $200 – $500 depending on the root cause and your vehicle.
Can I drive with P0404?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.