AutoCodes – Ford – P0406 2006 Ford Fusion

P0406 2006 Ford Fusion Code - Exhaust Gas Recirculation Sensor 'A' Circuit High

Quick Answer

The EGR monitor checks the EGR sensor signal to the Powertrain Control Module (PCM) for high 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: P0406 2006 Ford Fusion indicates Exhaust Gas Recirculation Sensor 'A' Circuit High.
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 3,508

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 Apr 18, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0406 2006 Ford Fusion Description

The EGR monitor checks the EGR sensor signal to the Powertrain Control Module (PCM) for high voltage. The test fails when the average voltage to the PCM exceeds the maximum calibrated value.

OBDII Code P0406 2006 Ford Fusion - Exhaust Gas Recirculation Sensor 'A' Circuit High - AutoCodes.com — P0406 2006 Ford Fusion Code - Exhaust Gas Recirculation Sensor 'A' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0406 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 P0406 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 P0406 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 P0406 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 P0406 2006 Ford Fusion Code

1. What are the common symptoms of OBDII code P0406 on a 2006 Ford Fusion?

The common symptoms of P0406 include the Check Engine Light illuminating on the dashboard, reduced engine performance, rough idling, and increased fuel consumption.

2. What does the OBDII code P0406 indicate for a 2006 Ford Fusion?

P0406 indicates a problem with the Exhaust Gas Recirculation (EGR) Sensor 'A' Circuit registering a high voltage.

3. What are the possible causes of OBDII code P0406 on a 2006 Ford Fusion?

Potential causes of P0406 include a faulty EGR sensor, damaged wiring in the EGR sensor circuit, a clogged EGR valve, or issues with the EGR valve control solenoid.

4. How can I diagnose the OBDII code P0406 on my 2006 Ford Fusion?

Diagnosing P0406 may involve using an OBDII scanner to retrieve the fault code, visually inspecting the EGR sensor and related components for damage, checking the wiring for continuity, and testing the EGR valve functionality.

5. Can I continue driving my 2006 Ford Fusion with OBDII code P0406?

It is not recommended to continue driving with P0406 present, as it can lead to poor engine performance and potential damage to other components over time. It's best to address the issue promptly.

6. How can I repair OBDII code P0406 on my 2006 Ford Fusion?

Repairing P0406 may involve replacing the EGR sensor, repairing or replacing damaged wiring, cleaning or replacing the EGR valve, or addressing any issues with the EGR valve control solenoid.

7. Is it possible to reset the OBDII code P0406 on a 2006 Ford Fusion?

Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue causing P0406 is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

8. Can a dirty EGR valve cause OBDII code P0406 on a 2006 Ford Fusion?

Yes, a dirty or clogged EGR valve can cause insufficient flow or improper operation, leading to the triggering of P0406. Cleaning or replacing the EGR valve may help resolve the issue.

9. How much does it typically cost to repair OBDII code P0406 on a 2006 Ford Fusion?

The cost of repairing P0406 can vary depending on the specific issue causing the code and whether you choose to address it yourself or take it to a mechanic. Costs may range from a few hundred dollars to over a thousand, including parts and labor.

10. Are there any preventive measures to avoid OBDII code P0406 on a 2006 Ford Fusion?

Regular maintenance, such as cleaning the EGR system components, checking for vacuum leaks, and using high-quality fuel, can help prevent issues that may lead to P0406.