Engine-Codes.com
Engine-Codes – Ford – P0403 Ford

P0403 Ford Code - Exhaust Gas Recirculation Control Circuit

Quick Answer

The P0403 code for Ford vehicles indicates a problem with the Exhaust Gas Recirculation (EGR) control circuit. Common causes include Faulty EGR valve position sensor, Wiring or connector issues in the EGR control circuit, Carbon buildup in the EGR system. 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 Ford indicates Exhaust Gas Recirculation Control Circuit .
Common causes
Common causes include Faulty EGR valve position sensor, Wiring or connector issues in the EGR control circuit, Carbon buildup in the EGR system.
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 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0403 Ford Description

The P0403 code for Ford vehicles indicates a problem with the Exhaust Gas Recirculation (EGR) control circuit. The EGR system is responsible for reducing nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the intake manifold to be burned again. When the EGR control circuit malfunctions, it can lead to issues with engine performance, fuel efficiency, and emissions. This code typically means that the EGR valve position sensor is sending an incorrect signal to the Engine Control Module (ECM), causing the system to operate incorrectly.

OBDII Code P0403 Ford - Exhaust Gas Recirculation Control Circuit
P0403 Ford Code - Exhaust Gas Recirculation Control Circuit

Common Causes of P0403 Ford

  1. Faulty EGR valve position sensor
  2. Wiring or connector issues in the EGR control circuit
  3. Carbon buildup in the EGR system
  4. Vacuum leaks in the EGR system
  5. ECM software issues

Symptoms of P0403 Ford

  1. Check Engine Light is illuminated
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Engine knocking or pinging noises
  5. Failed emissions test

How to Fix P0403 Ford

  1. Use a scan tool to verify the P0403 code and pinpoint the exact cause of the issue.
  2. Inspect the EGR valve position sensor and wiring for any damage or corrosion.
  3. Clean or replace the EGR valve if carbon buildup is present.
  4. Repair any wiring or connector issues in the EGR control circuit.
  5. Clear the code and test drive the vehicle to ensure the problem has been resolved.

Cost to Fix P0403 Ford

The cost of repairing a P0403 code on a Ford vehicle can vary depending on the specific cause of the issue. In general, the parts needed for this repair, such as a new EGR valve position sensor or wiring harness, can range from $50 to $200. The labor cost for this repair can be between $100 and $200, assuming a shop rate of $80 to $150 per hour. Overall, the total cost for addressing a P0403 code may be in the range of $150 to $400. It's recommended to consult with a trusted mechanic or repair shop to get an accurate estimate based on your vehicle's make and model.

When is the Code Detected?

An improper voltage signal is sent to ECM through the valve

Need more information about the P0403 Ford code?

Need more information on how to fix the P0403 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0403 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

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 Ford Code

What does the OBDII code P0403 mean for a Ford vehicle?

The code P0403 indicates a problem with the Exhaust Gas Recirculation (EGR) control circuit, which can affect the vehicle's emissions and performance.

What are common symptoms of the P0403 code?

Common symptoms include rough idling, poor acceleration, decreased fuel efficiency, and the check engine light being illuminated.

What can cause the P0403 code to trigger?

Possible causes include a faulty EGR valve, damaged wiring or connectors in the EGR circuit, or a malfunctioning EGR control module.

How can I diagnose the P0403 code?

To diagnose the P0403 code, check the EGR valve and its wiring for any visible damage, use a multimeter to test the EGR circuit's voltage and resistance, and scan for other related codes.

Can I drive my Ford vehicle with the P0403 code?

While you can technically drive with the P0403 code, it is not recommended as it can lead to increased emissions and potential long-term engine issues.

What are some common repairs for the P0403 code?

Common repairs may include replacing a faulty EGR valve, repairing damaged wiring or connectors, or replacing the EGR control module.

How much does it typically cost to fix the P0403 code?

Repair costs can vary widely, but they may range from $100 to $500 depending on whether you need to replace the EGR valve, repair wiring, or replace other components.

Will clearing the P0403 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but it will not fix the underlying issue, and the code will likely reappear if the problem is not addressed.

Is the P0403 code specific to Ford vehicles?

No, the P0403 code is a generic OBDII code that can occur in various makes and models, but the specifics of the EGR system may vary between manufacturers.

Discuss the causes and fixes for P0403 Ford OBDII Code

Submit a New Comment

  • My gas fuel cap light came on first then after a couple of weeks the check engine light came on that was on a 2003 Ford Escape xl

    Reply to Comment

  • How is the gas cap? you should start by replacing the gas cap.

    Reply to Comment