P0404 Code - Exhaust Gas Recirculation Circuit Range/Performance

Quick Answer

The P0404 diagnostic trouble code (DTC) refers to the Exhaust Gas Recirculation (EGR) system circuit having a range/performance issue. Common causes include Faulty EGR valve, EGR valve stuck open or closed, Clogged EGR passages or tubes. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means

P0404 indicates Exhaust Gas Recirculation Circuit Range/Performance.

Common causes

Common causes include Faulty EGR valve, EGR valve stuck open or closed, Clogged EGR passages or tubes.

Severity

Moderate - service should be scheduled soon.

Can I drive?

The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• Tech Notes
• FAQs
• Comments
• Add Comment

Common Causes of P0404

Symptoms of P0404

How to Fix P0404

Cost to Fix P0404

Tech Notes for P0404

When is the Code Detected?

Need more information about the P0404 code?

Need more information on how to fix the P0404 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0404 code diagnosed by a professional: Find a repair shop in your area

Code P0404 Information for Specific Makes

• P0404 Acura — Exhaust Gas Recirculation Valve Circuit Range/Performance
• P0404 Audi — Exhaust Gas Recirculation Control Circuit Range/Performance
• P0404 Buick — Exhaust Gas Recirculation Open Position Performance
• P0404 Cadillac — Exhaust Gas Recirculation Open Position Performance
• P0404 Chevrolet — Exhaust Gas Recirculation Open Position Performance
• P0404 Chrysler — Exhaust Gas Recirculation Position Sensor Performance
• P0404 Dodge — Exhaust Gas Recirculation Position Sensor Performance
• P0404 Ford — Exhaust Gas Recirculation Circuit Range/Performance
• P0404 GMC — Exhaust Gas Recirculation Open Position Performance
• P0404 Honda — Exhaust Gas Recirculation Valve Circuit Range/Performance
• P0404 Isuzu — Exhaust Gas Recirculation Open Position Performance
• P0404 Jeep — Exhaust Gas Recirculation Position Sensor Performance
• P0404 Lincoln — Exhaust Gas Recirculation Circuit Range/Performance
• P0404 Mazda — Exhaust Gas Recirculation Control Circuit Range/Performance
• P0404 Mercedes-Benz — Exhaust Gas Recirculation Circuit Range/Performance
• P0404 Mercury — Exhaust Gas Recirculation Circuit Range/Performance
• P0404 Mitsubishi — Exhaust Gas Recirculation Position Sensor Circuit Performance
• P0404 Pontiac — Exhaust Gas Recirculation Open Position Performance
• P0404 Saturn — Exhaust Gas Recirculation Open Position Performance
• P0404 Volkswagen — Exhaust Gas Recirculation Control Circuit Range/Performance

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0404 Code

1. What are common symptoms of OBDII code P0404?

- Common symptoms of code P0404 include decreased fuel efficiency, rough idling, engine hesitation, and illuminated Check Engine light.

2. What does the OBDII code P0404 indicate?

- OBDII code P0404 indicates a problem with the Exhaust Gas Recirculation (EGR) circuit, specifically related to range/performance issues.

3. What are the possible causes of OBDII code P0404?

- Possible causes of code P0404 include a faulty EGR valve, clogged EGR passages, wiring issues, vacuum leaks, or a malfunctioning EGR position sensor.

4. How can I diagnose the cause of OBDII code P0404?

- Diagnosing code P0404 may involve checking the EGR valve operation, inspecting for clogged passages, testing the EGR position sensor, and verifying wiring integrity using a diagnostic scanner.

5. Can driving with OBDII code P0404 cause further damage to my vehicle?

- Driving with code P0404 may lead to reduced engine performance and increased emissions, but it is unlikely to cause immediate severe damage. However, prolonged driving with this code unresolved can affect engine longevity.

6. How can I repair OBDII code P0404?

- Repairing code P0404 may involve cleaning or replacing the EGR valve, clearing any blockages in the EGR system, repairing wiring issues, or replacing the EGR position sensor.

7. Is it safe to continue driving with OBDII code P0404?

- While it may be safe to drive with code P0404 in the short term, it is recommended to address the issue promptly to prevent potential engine performance issues and increased emissions.

8. Can a DIY enthusiast fix OBDII code P0404 at home?

- Depending on the underlying cause, DIY enthusiasts with mechanical knowledge and access to basic tools may be able to address code P0404 at home by following repair guides or tutorials.

9. How long does it typically take to repair OBDII code P0404?

- The repair time for code P0404 can vary based on the cause of the issue and the complexity of the repair. It may take anywhere from 1-4 hours to diagnose and fix the problem.

10. Will resetting the Check Engine light resolve OBDII code P0404?

- Simply resetting the Check Engine light without addressing the underlying issue causing code P0404 will not fix the problem. It is crucial to diagnose and repair the root cause of the code to prevent it from reoccurring.