P0404
EGR A Control Circuit Range/Performance
P0404 is an OBD-II diagnostic trouble code meaning: EGR A Control Circuit Range/Performance. Common causes: egr valve malfunction, dirty or stuck egr valve. Estimated repair cost: $56–167.
Symptoms
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- EGR valve malfunction
- Dirty or stuck EGR valve
- Open or short circuit in EGR valve wiring harness
- EGR valve position sensor malfunction
- Problems with the engine ECU
How to Fix
- Check the EGR valve wiring harness and connectors for damage.
- Clean or replace EGR valve
- Check EGR valve position sensor
- Check the operation of the engine ECU
- Reset the error and take a test drive
Related codes
Error P0404 by Vehicle Brand
FAQ
What does the P0404 code mean?
P0404 is an OBD-II diagnostic trouble code that indicates: EGR A Control Circuit Range/Performance
What causes a P0404 error code?
The most common causes of P0404 include: EGR valve malfunction; Dirty or stuck EGR valve; Open or short circuit in EGR valve wiring harness; EGR valve position sensor malfunction.
How do I fix a P0404 diagnostic trouble code?
To fix P0404: Check the EGR valve wiring harness and connectors for damage.. Clean or replace EGR valve. Check EGR valve position sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0404?
Limited driving only, diagnose soon
How much does it cost to fix P0404?
The estimated repair cost for P0404 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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