P0402 Ford Code - Exhaust Gas Recirculation Flow Excessive Detected
Quick Answer
Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Common causes include EGR volume control valve stuck open, Faulty EGR volume control valve, EGR solenoid valve harness is open or shorted. 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 EGR volume control valve stuck open, Faulty EGR volume control valve, EGR solenoid valve harness is open or shorted.
- 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.
Code P0402 Ford Description
The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECΜ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECΜ does not issue the pulse signal. Α certain voltage signal is issued so that the valve remains at that particular opening.
What are the Possible Causes of the DTC P0402 Ford?
- EGR volume control valve stuck open
- Faulty EGR volume control valve
- EGR solenoid valve harness is open or shorted
- EGR solenoid valve circuit poor electrical connection
- Faulty EGR temperature sensor and circuit
How to Fix the DTC P0402 Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0402 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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
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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?
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Probly not.. check vacume lines and sensor connectors as well as any melted wires leading from ECM to module.
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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.
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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
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