AutoCodes – Ford – P0405 2011 Ford Fusion

P0405 2011 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 2011 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 3,096

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 2011 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 2011 Ford Fusion - Exhaust Gas Recirculation Sensor 'A' Circuit Low - AutoCodes.com — P0405 2011 Ford Fusion Code - Exhaust Gas Recirculation Sensor 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0405 2011 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 2011 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 2011 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 2011 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 2011 Ford Fusion Code

What does the OBDII code P0405 mean on a 2011 Ford Fusion?

The P0405 code indicates a low voltage signal from the Exhaust Gas Recirculation (EGR) Sensor 'A' Circuit, which monitors the position of the EGR valve.

What are the common symptoms of code P0405 in a 2011 Ford Fusion?

Symptoms can include the check engine light turning on, rough idling, reduced fuel efficiency, and possible engine hesitation or stalling.

What causes the P0405 code to appear?

Common causes include a faulty EGR position sensor, wiring or connector issues in the EGR circuit, or carbon buildup in the EGR valve.

Is it safe to drive with a P0405 code on a 2011 Ford Fusion?

While the car may still operate, driving with this code can lead to reduced performance, increased emissions, and potential engine damage if the issue isn't resolved promptly.

How do you diagnose the P0405 code?

Diagnosis typically involves checking the EGR sensor voltage with a scan tool, inspecting the wiring and connectors for damage, and testing the functionality of the EGR valve.

Can a dirty EGR valve trigger the P0405 code?

Yes, excessive carbon buildup in the EGR valve can restrict movement, potentially causing the sensor to send incorrect signals.

How do you fix the P0405 code on a 2011 Ford Fusion?

Repairs may include replacing the EGR position sensor, cleaning or replacing the EGR valve, or repairing damaged wiring or connectors.

What tools are needed to troubleshoot the P0405 code?

A scan tool to read live data, a multimeter for testing electrical circuits, and basic hand tools for disassembly and inspection are typically required.

Does the P0405 code affect emissions?

Yes, a malfunctioning EGR system can cause increased nitrogen oxide (NOx) emissions, leading to potential smog check failures.

Can a P0405 code clear itself after repairs?

The code may clear after repairs if the underlying issue is resolved, but itâ€™s recommended to use a scan tool to erase the code and confirm the fix.