AutoCodes – Ford – P0402 2012 Ford Fusion

P0402 2012 Ford Fusion Code - Exhaust Gas Recirculation Flow Excessive Detected

Quick Answer

The EGR system is monitored for undesired EGR flow during idle. 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 2012 Ford Fusion 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.

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Code Popularity 3,076

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0402 2012 Ford Fusion Description

The EGR system is monitored for undesired EGR flow during idle. The EGR monitor looks at the differential pressure feedback EGR (DPFE) signal at idle and compares it to the stored signal measured during ignition on engine off. The test does not pass when the signal at idle is greater than at ignition on engine off by a calibrated amount.

OBDII Code P0402 2012 Ford Fusion - Exhaust Gas Recirculation Flow Excessive Detected - AutoCodes.com — P0402 2012 Ford Fusion Code - Exhaust Gas Recirculation Flow Excessive Detected

What does this mean?

What are the Possible Causes of the DTC P0402 2012 Ford Fusion?

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 2012 Ford Fusion?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0402 2012 Ford Fusion 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.

Need more information about the P0402 2012 Ford Fusion code?

Need more information on how to fix the P0402 2012 Ford Fusion code? Get Access to Factory Service Manuals

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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 P0402 2012 Ford Fusion Code

1. What are the common symptoms of OBDII code P0402 in a 2012 Ford Fusion?

The common symptoms include rough idling, decreased fuel efficiency, engine hesitation, and the illumination of the check engine light.

2. What causes the OBDII code P0402 in a 2012 Ford Fusion?

The code P0402 is triggered when the exhaust gas recirculation (EGR) flow is detected to be excessive, often caused by a faulty EGR valve, clogged EGR passages, or a malfunctioning EGR temperature sensor.

3. How can I diagnose the OBDII code P0402 in a 2012 Ford Fusion?

Diagnosing the code involves checking the EGR valve for proper functioning, inspecting the EGR system for clogs, and testing the EGR temperature sensor using a multimeter.

4. Can I drive my 2012 Ford Fusion with the OBDII code P0402?

It is not recommended to drive your vehicle with code P0402 as it can lead to further damage to the engine and emission components. It is advisable to address the issue promptly.

5. What are the potential repair options for fixing OBDII code P0402 in a 2012 Ford Fusion?

Repair options may include cleaning or replacing the EGR valve, cleaning the EGR passages, testing and replacing the EGR temperature sensor, and resetting the trouble code.

6. How much does it cost to repair the OBDII code P0402 in a 2012 Ford Fusion?

The cost of repairing code P0402 can vary depending on the specific cause of the issue, but it generally ranges from $150 to $500, including parts and labor.

7. How long does it take to fix the OBDII code P0402 in a 2012 Ford Fusion?

The repair time for code P0402 can vary based on the extent of the issue and the repair needed, but it typically takes 1-3 hours for a professional mechanic to address the problem.

8. Can a DIY enthusiast fix the OBDII code P0402 in a 2012 Ford Fusion?

While some experienced DIYers may be able to address the issue themselves, diagnosing and repairing code P0402 often requires specialized tools and knowledge, so it is recommended to consult a professional mechanic.

9. Will resetting the trouble code fix the OBDII code P0402 in a 2012 Ford Fusion?

Simply resetting the trouble code may temporarily turn off the check engine light, but it will not fix the underlying issue causing code P0402. It is crucial to diagnose and repair the problem to prevent it from reoccurring.

10. What happens if I ignore the OBDII code P0402 in a 2012 Ford Fusion?

Ignoring code P0402 can lead to reduced engine performance, increased emissions, and potential damage to other engine components over time. It is best to address the issue promptly to maintain the vehicle's optimal performance.