AutoCodes – Ford – P0402 2010 Ford Fusion

P0402 2010 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 2010 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 3,181

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 2010 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 2010 Ford Fusion - Exhaust Gas Recirculation Flow Excessive Detected - AutoCodes.com — P0402 2010 Ford Fusion Code - Exhaust Gas Recirculation Flow Excessive Detected

What does this mean?

What are the Possible Causes of the DTC P0402 2010 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 2010 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 2010 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 2010 Ford Fusion code?

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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 2010 Ford Fusion Code

1. What are common symptoms of OBDII code P0402 on a 2010 Ford Fusion?

- Common symptoms include rough idling, decreased fuel efficiency, engine stalling, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P0402 on a 2010 Ford Fusion?

- The code P0402 typically indicates excessive exhaust gas recirculation (EGR) flow, which can be caused by a faulty EGR valve, clogged EGR passages, or issues with the EGR vacuum solenoid.

3. How serious is OBDII code P0402 on a 2010 Ford Fusion?

- While the vehicle may still be operable with this code, it is important to address it promptly as it can lead to decreased engine performance and increased emissions.

4. Can I continue driving my 2010 Ford Fusion with OBDII code P0402?

- It is generally not recommended to drive the vehicle for an extended period with this code present, as it can potentially cause further damage to the engine or emissions system.

5. How can I diagnose OBDII code P0402 on my 2010 Ford Fusion?

- Diagnosing this code typically involves checking the EGR valve operation, inspecting the EGR system for blockages, and using a scan tool to monitor EGR valve performance.

6. Can I repair OBDII code P0402 on a 2010 Ford Fusion myself?

- Depending on your level of automotive expertise, you may be able to address this code yourself by replacing the EGR valve, cleaning EGR passages, or checking and replacing the EGR vacuum solenoid.

7. Will resetting the Check Engine Light fix OBDII code P0402 on a 2010 Ford Fusion?

- Resetting the Check Engine Light may temporarily turn it off, but the underlying issue causing the code will still need to be addressed to prevent it from reoccurring.

8. How much does it cost to repair OBDII code P0402 on a 2010 Ford Fusion?

- The cost of repairing this code can vary depending on the specific cause, but it may involve replacing the EGR valve, cleaning EGR passages, or addressing other related components. Costs can range from $100 to $500 or more.

9. Can a clogged catalytic converter trigger OBDII code P0402 on a 2010 Ford Fusion?

- While a clogged catalytic converter typically triggers a different code, such as P0420, it can sometimes cause issues that lead to an EGR-related fault like P0402.

10. How often does OBDII code P0402 occur in a 2010 Ford Fusion?

- The occurrence of code P0402 can vary depending on factors such as vehicle maintenance, driving conditions, and the overall health of the EGR system.