P0402 Ford Code - Exhaust Gas Recirculation Flow Excessive Detected
Quick Answer
The P0402 diagnostic trouble code (DTC) for Ford vehicles indicates that the exhaust gas recirculation (EGR) system is detecting excessive flow. Common causes include Malfunctioning EGR valve, Clogged EGR passages, Faulty EGR temperature sensor. 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
- P0402 Ford indicates Exhaust Gas Recirculation Flow Excessive Detected.
- Common causes
- Common causes include Malfunctioning EGR valve, Clogged EGR passages, Faulty EGR temperature sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0402 Ford Description
The P0402 diagnostic trouble code (DTC) for Ford vehicles indicates that the exhaust gas recirculation (EGR) system is detecting excessive flow. The EGR system is responsible for recirculating a portion of the exhaust gases back into the engine's intake manifold to reduce combustion temperatures and emissions of nitrogen oxides (NOx). When the EGR flow is excessive, it can lead to issues such as poor engine performance, increased emissions, and potential damage to engine components.
Common Causes of P0402 Ford
- Malfunctioning EGR valve
- Clogged EGR passages
- Faulty EGR temperature sensor
- EGR solenoid issues
- Carbon buildup in the EGR system
Symptoms of P0402 Ford
- Check Engine Light illuminated
- Reduced fuel efficiency
- Rough idling or stalling
- Engine knocking or pinging
- Increased emissions
How to Fix P0402 Ford
- Diagnose the EGR system using a scan tool to determine the exact cause of the excessive flow.
- Inspect and clean EGR passages to ensure proper flow.
- Test the EGR valve and replace if malfunctioning.
- Check the EGR temperature sensor and solenoid for proper operation and replace if necessary.
- Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0402 Ford
The cost of repairing a P0402 code on a Ford vehicle can vary depending on the specific cause of the issue. On average, the parts for an EGR valve replacement can range from $100 to $300, while labor costs can be between $100 and $200. Overall, the total repair costs for addressing an excessive EGR flow issue typically range from $200 to $500. Keep in mind that these estimates are general and actual costs may vary based on location, vehicle make and model, and other factors. It is recommended to consult with a professional mechanic for a more accurate cost estimate.
Tech Notes for P0402 Ford
2000-2002 Ford Taurus
2001-2002 Ford Crown Victoria
2001-2002 Ford Focus
2001-2002 Ford Mustang
2001 Ford Explorer USPS
2001-2002 Ford E Series
2001-2002 Ford Escape
2001-2002 Ford Expedition
2001-2002 Ford Explorer Sport Trac
2001-2002 Ford Explorer Sport
2001-2002 Ford F-150
2001-2002 Ford Ranger
2001-2002 Ford Windstar
2002-2003 Ford Explorer
Ford Factory Service Bulletin OBDII Code P0402 Code
User Submitted Video
When is the Code Detected?
Need more information about the P0402 Ford code?
Need more information on how to fix the P0402 Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0402 Ford code diagnosed by a professional: Find a repair shop in your area
Information for Specific Ford Models
- P0402 1997 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 1998 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 1999 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2000 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2001 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2002 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2003 Ford F150 — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2006 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2007 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2008 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2009 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2010 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2011 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
- P0402 2012 Ford Fusion — Exhaust Gas Recirculation Flow Excessive Detected
Frequently Asked Questions about P0402 Ford Code
1. What are common symptoms of OBDII code P0402 in a Ford vehicle?
- Common symptoms include rough idling, engine hesitation, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What are the possible causes of OBDII code P0402 in a Ford car?
- The code P0402 in a Ford is typically triggered by issues such as a faulty EGR valve, clogged EGR passages, a malfunctioning EGR temperature sensor, or a problem with the EGR vacuum control solenoid.
3. How can I diagnose the cause of OBDII code P0402 in my Ford vehicle?
- Diagnosis involves checking the EGR valve and its connections, inspecting the EGR passages for blockages, testing the EGR temperature sensor, and verifying the functionality of the EGR vacuum control solenoid.
4. What are the potential risks of driving with OBDII code P0402 present in a Ford car?
- Driving with code P0402 can lead to decreased engine performance, increased emissions, and potential damage to the catalytic converter over time.
5. Can I repair OBDII code P0402 in a Ford vehicle myself?
- Depending on the underlying cause, some DIY repairs for code P0402 may include cleaning or replacing the EGR valve, clearing out clogged EGR passages, or replacing faulty sensors. However, more complex issues may require professional assistance.
6. Is it safe to continue driving my Ford vehicle with OBDII code P0402?
- While the vehicle may still be operable with code P0402 present, it is recommended to address the issue promptly to prevent further damage and ensure optimal engine performance.
7. How much does it typically cost to repair OBDII code P0402 in a Ford car?
- The cost of repairing code P0402 in a Ford can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for simple fixes to over a thousand dollars for more complex repairs involving parts replacement.
8. Are there any preventative maintenance tips to avoid OBDII code P0402 in a Ford vehicle?
- Regularly servicing the EGR system, using high-quality fuel, and maintaining proper engine performance can help prevent issues that may trigger code P0402 in a Ford vehicle.
9. Will resetting the Check Engine Light resolve OBDII code P0402 in my Ford car?
- Simply clearing the code and resetting the Check Engine Light without addressing the underlying issue will not fix code P0402. It is important to diagnose and repair the root cause of the problem to prevent the code from reoccurring.
10. How long does it take to repair OBDII code P0402 in a Ford vehicle?
- The repair time for code P0402 in a Ford can vary based on the specific cause of the issue and the complexity of the repair. Simple fixes may take a few hours, while more involved repairs could require a day or more depending on parts availability and labor.
Discuss the causes and fixes for P0402 Ford OBDII Code
-
I replaced the EGR valve because it was saying p0401 engine code low output of exhaust now it's saying p0402 high output of exhaust I'm wondering if the EGR valve I bought was faulty I bought it brand-new online could anybody give me some helpful tips on if I should just resend it in and get another one?
-
Probly not.. check vacume lines and sensor connectors as well as any melted wires leading from ECM to module.
-
do a diagnostic for the DPFE sensor - it signals the PCM to open and close the EGR. If the DPFE sensor has failed it will yield p0401 or p0402 codes - the egr is either not opening adequately or its opening too much - the EGR is not at fault - its the DPFE sensor telling the the EGR what to do.
-
do a diagnostic for the DPFE sensor - it signals the PCM to open and close the EGR. If the DPFE sensor has failed it will yield p0401 or p0402 codes - the egr is either not opening adequately or its opening too much - the EGR is not at fault - its the DPFE sensor telling the the EGR what to do - the dpfe sensor can be diagnosed using a multimeter and a vacuum pump
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.