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Engine-Codes – Nissan – P0403 2004 Nissan Maxima

P0403 2004 Nissan Maxima Code - Exhaust Gas Recirculation Volume Control Valve Circuit

Quick Answer

The P0403 diagnostic trouble code (DTC) for a 2004 Nissan Maxima relates to the Exhaust Gas Recirculation (EGR) Volume Control Valve Circuit. Common causes include Faulty EGR volume control valve, Wiring issues in the EGR circuit, ECM malfunction. 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
P0403 2004 Nissan Maxima indicates Exhaust Gas Recirculation Volume Control Valve Circuit.
Common causes
Common causes include Faulty EGR volume control valve, Wiring issues in the EGR circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0403 2004 Nissan Maxima Description

The P0403 diagnostic trouble code (DTC) for a 2004 Nissan Maxima relates to the Exhaust Gas Recirculation (EGR) Volume Control Valve Circuit. The EGR system is designed to reduce nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the engine's intake manifold. The EGR volume control valve regulates the flow of exhaust gases into the intake manifold, helping to control combustion temperatures and reduce emissions.

OBDII Code P0403 2004 Nissan Maxima - Exhaust Gas Recirculation Volume Control Valve Circuit
P0403 2004 Nissan Maxima Code - Exhaust Gas Recirculation Volume Control Valve Circuit

Common Causes of P0403 2004 Nissan Maxima

  1. Faulty EGR volume control valve
  2. Wiring issues in the EGR circuit
  3. ECM malfunction
  4. Carbon buildup in the EGR system
  5. Vacuum leaks in the EGR system

Symptoms of P0403 2004 Nissan Maxima

  1. Rough idling or engine stalling
  2. Decreased fuel efficiency
  3. Check Engine Light illuminated
  4. Failed emissions test
  5. Engine misfires

How to Fix P0403 2004 Nissan Maxima

  1. Begin by conducting a thorough inspection of the EGR volume control valve and associated wiring for any signs of damage or corrosion.
  2. Test the EGR volume control valve using a multimeter to check for proper operation.
  3. Check the ECM for any fault codes related to the EGR system and address any underlying issues.
  4. Clean the EGR system to remove any carbon buildup that may be affecting valve operation.
  5. If necessary, replace the EGR volume control valve or repair any damaged wiring in the circuit.

Cost to Fix P0403 2004 Nissan Maxima

The cost of repairing a P0403 code on a 2004 Nissan Maxima can vary depending on the specific cause of the issue. In general, replacing the EGR volume control valve can cost between $150 and $300, while labor costs can range from $100 to $200. If wiring repairs or ECM replacement are necessary, additional costs may apply. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific diagnosis and repair needed. Labor rates typically range from $80 to $150 per hour, but can vary based on location and shop rates.

When is the Code Detected?

An improper voltage signal is sent to ECM through the valve

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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 P0403 2004 Nissan Maxima Code

1. What are the common symptoms of OBDII code P0403 on a 2004 Nissan Maxima?

The common symptoms of code P0403 include rough idling, decreased fuel efficiency, engine stalling, and the illumination of the Check Engine Light.

2. What does the OBDII code P0403 indicate on a 2004 Nissan Maxima?

Code P0403 indicates a potential issue with the Exhaust Gas Recirculation (EGR) Volume Control Valve Circuit in the 2004 Nissan Maxima.

3. What are the possible causes of OBDII code P0403 on a 2004 Nissan Maxima?

Possible causes of code P0403 include a faulty EGR volume control valve, a damaged EGR valve position sensor, wiring issues, or a failed EGR system.

4. How can I diagnose the cause of OBDII code P0403 on my 2004 Nissan Maxima?

Diagnosing code P0403 typically involves inspecting the EGR valve and its components, checking for wiring faults, testing the EGR valve position sensor, and using a scan tool to monitor EGR system data.

5. Can I still drive my 2004 Nissan Maxima with OBDII code P0403 present?

It is not recommended to drive your vehicle with code P0403 active, as it can lead to poor engine performance and potential damage to other components over time.

6. How can I repair OBDII code P0403 on a 2004 Nissan Maxima?

Repairing code P0403 may involve replacing the EGR volume control valve, repairing or replacing damaged wiring, resetting the EGR system, or addressing any underlying issues causing the fault.

7. Can a dirty EGR system cause OBDII code P0403 on a 2004 Nissan Maxima?

Yes, a dirty or clogged EGR system can restrict the flow of exhaust gases, leading to code P0403 on a 2004 Nissan Maxima.

8. How much does it cost to fix OBDII code P0403 on a 2004 Nissan Maxima?

The cost of fixing code P0403 can vary depending on the exact cause of the issue, but it may range from $100 to $500 for parts and labor.

9. Will resetting the Check Engine Light resolve OBDII code P0403 on a 2004 Nissan Maxima?

Resetting the Check Engine Light may temporarily turn off the light, but it will not fix the underlying issue causing code P0403. It is important to diagnose and repair the problem to prevent further issues.

10. Is OBDII code P0403 a common problem in 2004 Nissan Maxima vehicles?

While not extremely common, code P0403 can occur in 2004 Nissan Maxima vehicles due to issues with the EGR system components. Regular maintenance and inspections can help prevent this code from appearing.

Discuss the causes and fixes for P0403 2004 Nissan Maxima OBDII Code

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  • On a 2004 Maxima what does a 403 code means and what are the powers involved

    Reply to Comment

  • The P0403 code means that there is a problem with the EGR volume control solenoid valve or the wires from the valve to the Engine Control Module (ECM)

    Reply to Comment