AutoCodes – Ford – P1408 2010 Ford Fusion

P1408 2010 Ford Fusion Code - EGR Flow Out of Self-Test Range

Quick Answer

The Exhaust Gas Recirculation (EGR) system recirculates a portion of the exhaust gasses into the intake manifold under average vehicle driving conditions to reduce combustion temperatures and exhaust gas NOx content. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective, Plugged Exhaust Gas Recirculation (EGR) Valve. 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: P1408 2010 Ford Fusion indicates EGR Flow Out of Self-Test Range.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective, Plugged Exhaust Gas Recirculation (EGR) Valve.
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 3,549

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 Aug 20, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1408 2010 Ford Fusion Description

The Exhaust Gas Recirculation (EGR) system recirculates a portion of the exhaust gasses into the intake manifold under average vehicle driving conditions to reduce combustion temperatures and exhaust gas NOx content. The amount of exhaust gas recirculated varies from zero with a cold engine to a fixed rate for a hot engine with intermediate load and low engine speed.
This test is performed during the Key On Engine Running (KOER) on demand self-test only. The EGR system is commanded ON at a fixed engine speed. The test fails and the Diagnostic Trouble Code (DTC) is output when the measured EGR flow falls above or below the required calibration.

OBDII Code P1408 2010 Ford Fusion - EGR Flow Out of Self-Test Range - AutoCodes.com — P1408 2010 Ford Fusion Code - EGR Flow Out of Self-Test Range

What does this mean?

What are the Possible Causes of the DTC P1408 2010 Ford Fusion?

Faulty Exhaust Gas Recirculation (EGR) Valve
Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective
Plugged Exhaust Gas Recirculation (EGR) Valve

How to Fix the DTC P1408 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 does this mean?

Code Tech Notes

Also see P0400 and P0401.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1408 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.

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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 P1408 2010 Ford Fusion Code

1. What does the OBDII code P1408 mean on a 2010 Ford Fusion?

P1408 indicates that the Exhaust Gas Recirculation (EGR) flow is out of the expected range during self-testing, meaning the system isnâ€™t operating as intended.

2. What are the common symptoms of code P1408 on a 2010 Ford Fusion?

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

3. What causes the P1408 code in a 2010 Ford Fusion?

Possible causes include a faulty EGR valve, a clogged EGR passage, a malfunctioning EGR sensor, vacuum leaks, or issues with the EGR control solenoid.

4. Can I still drive my 2010 Ford Fusion with a P1408 code?

While the car may still be drivable, itâ€™s not recommended as it can lead to reduced fuel efficiency, increased emissions, and potential damage to other engine components over time.

5. How can I fix the P1408 code on my 2010 Ford Fusion?

Start by inspecting and cleaning the EGR valve and passages. If the issue persists, test and replace the EGR valve, sensor, or solenoid as necessary.

6. How do I diagnose the cause of P1408 on a 2010 Ford Fusion?

Use an OBDII scanner to confirm the code, then inspect the EGR system for carbon buildup, vacuum leaks, or faulty components. Perform a manual test of the EGR valve and sensor.

7. Can a dirty EGR valve trigger the P1408 code?

Yes, carbon buildup inside the EGR valve or its passages can restrict flow and trigger the P1408 code.

8. How much does it cost to repair the P1408 code on a 2010 Ford Fusion?

Costs vary depending on the issue, but cleaning the EGR valve might cost $50-$100, while replacing the EGR valve or related components can cost $200-$400, including labor.

9. Could a vacuum leak cause the P1408 code?

Yes, a vacuum leak can disrupt the function of the EGR system and lead to the P1408 code being set.

10. Will replacing the EGR valve always fix the P1408 code?

Not necessarily. If the issue lies in clogged passages, a faulty sensor, or vacuum leaks, replacing the EGR valve alone wonâ€™t resolve the problem. Comprehensive diagnosis is key.