EGR Control Circuit Range/Performance
2005-2005 Chevrolet Impala 3.4L V6
The 2005 Chevrolet Impala is equipped with a 3.4L V6 engine. Below you'll find detailed p0404 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The EGR valve is not responding as commanded by the PCM.
Symptoms
- Check Engine Light
- Rough idle
- Stalling
- Poor performance
Common Causes
- Carbon restricting EGR valve movement
- Faulty position sensor in EGR
- EGR valve mechanically stuck
Diagnostic Steps
- Command EGR open/closed with scan tool and monitor position
- Check for carbon restricting movement
- Test position sensor
Repair Notes
Clean or replace EGR valve.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0404 on Other Vehicles
Chevrolet Astro
1996-1996 4.3L V6 Vortec
Chevrolet Astro
1997-1997 4.3L V6 Vortec
Chevrolet Astro
1998-1998 4.3L V6 Vortec
Chevrolet Astro
1999-1999 4.3L V6 Vortec
Chevrolet Astro
2000-2000 4.3L V6 Vortec
Chevrolet Astro
2001-2001 4.3L V6 Vortec
Chevrolet Astro
2002-2002 4.3L V6 Vortec
Chevrolet Astro
2003-2003 4.3L V6 Vortec
Common Questions
What does code P0404 mean on a 2005-2005 Chevrolet Impala?
P0404 stands for "EGR Control Circuit Range/Performance". The EGR valve is not responding as commanded by the PCM.
What are the symptoms of P0404 on a Chevrolet Impala?
Common symptoms of P0404 include: Check Engine Light, Rough idle, Stalling, Poor performance.
What causes P0404 on a 2005-2005 Chevrolet Impala?
Common causes of P0404 include: Carbon restricting EGR valve movement, Faulty position sensor in EGR, EGR valve mechanically stuck.
Last updated: March 2026
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