AutoCodes – Ford – P0405 2006 Ford Fusion

P0405 2006 Ford Fusion Code - Exhaust Gas Recirculation Sensor 'A' Circuit Low

Quick Answer

The EGR monitor checks the differential pressure feedback EGR sensor signal to the Powertrain Control Module (PCM) for low voltage. Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control 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: P0405 2006 Ford Fusion indicates Exhaust Gas Recirculation Sensor 'A' Circuit Low.
Common causes: Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control 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 3,847

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 P0405 2006 Ford Fusion Description

The EGR monitor checks the differential pressure feedback EGR sensor signal to the Powertrain Control Module (PCM) for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.

OBDII Code P0405 2006 Ford Fusion - Exhaust Gas Recirculation Sensor 'A' Circuit Low - AutoCodes.com — P0405 2006 Ford Fusion Code - Exhaust Gas Recirculation Sensor 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0405 2006 Ford Fusion?

Faulty EGR volume control solenoid valve
Carbon built up on EGR valve
EGR volume control solenoid valve harness is open or shorted
EGR volume control solenoid valve circuit poor electrical connection
Faulty EGR temperature sensor and circuit

How to Fix the DTC P0405 2006 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 P0405 2006 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 P0405 2006 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 P0405 2006 Ford Fusion Code

1. What are the common symptoms of OBDII code P0405 in a 2006 Ford Fusion?

The common symptoms include rough idling, engine hesitation, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0405 on a 2006 Ford Fusion indicate?

The code P0405 indicates a problem with the Exhaust Gas Recirculation (EGR) sensor 'A' circuit being detected as too low by the vehicle's engine control module (ECM).

3. What are the possible causes of the P0405 code in a 2006 Ford Fusion?

Possible causes include a faulty EGR sensor, wiring issues in the EGR sensor circuit, a problem with the ECM, or a clogged EGR valve.

4. How can I diagnose the P0405 code in my 2006 Ford Fusion?

Diagnosing the code involves checking the EGR sensor for proper operation, inspecting the wiring for any damage or corrosion, and testing the EGR valve for blockages.

5. Can I drive my 2006 Ford Fusion with the P0405 code?

It is not recommended to drive the vehicle with the P0405 code present, as it can lead to poor engine performance and potentially cause further damage to the vehicle.

6. How do I repair the Exhaust Gas Recirculation sensor 'A' circuit low issue in my 2006 Ford Fusion?

Repairing the issue may involve replacing the EGR sensor, repairing any damaged wiring, cleaning or replacing the EGR valve, or resetting the ECM after fixing the problem.

7. Will resetting the Check Engine Light fix the P0405 code in my 2006 Ford Fusion?

Resetting the Check Engine Light may temporarily turn it off, but the underlying issue causing the P0405 code will still need to be diagnosed and repaired to prevent the code from reoccurring.

8. Can a dirty EGR valve cause the P0405 code in a 2006 Ford Fusion?

Yes, a dirty or clogged EGR valve can restrict the flow of exhaust gases, leading to the EGR sensor 'A' circuit being detected as too low and triggering the P0405 code.

9. Is it possible to prevent the P0405 code from appearing in my 2006 Ford Fusion?

Regular maintenance, such as cleaning the EGR valve and replacing the EGR sensor as recommended by the manufacturer, can help prevent the P0405 code from appearing in the future.

10. How much does it typically cost to repair the P0405 code in a 2006 Ford Fusion?

The cost of repairing the P0405 code can vary depending on the exact cause of the issue, but it may range from around $100 to $500, including parts and labor.