AutoCodes – Ford – P0405 Ford

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

Quick Answer

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Îœodule (ECÎœ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Îœodulator. 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 Ford 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 57,760

How popular is this code, among other codes? Medium

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0405 Ford Description

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Îœodule (ECÎœ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Îœodulator. Depending on the engine and driving conditions, the ECÎœ will control the EGR Solenoid which will operate the EGR Vacuum Îœodulator to regulate the opening and closing of the EGR Valve.
The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECÎœ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECÎœ does not issue the pulse signal. Î‘ certain voltage signal is issued so that the valve remains at that particular opening.

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

What does this mean?

What are the Possible Causes of the DTC P0405 Ford?

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 Ford?

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 Ford 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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Information for Specific Ford Models

P0405 1997 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 1998 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 1999 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2000 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2001 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2002 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2003 Ford F150 — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2006 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2007 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2008 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2009 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2010 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2011 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low
P0405 2012 Ford Fusion — Exhaust Gas Recirculation Sensor 'A' Circuit Low

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 Ford Code

1. What are common symptoms of OBDII code P0405 in a Ford vehicle?

The common symptoms of the P0405 code include rough idling, decreased fuel efficiency, engine stalling, and the illumination of the Check Engine Light.

2. What does the OBDII code P0405 Ford indicate?

The P0405 code indicates a problem with the Exhaust Gas Recirculation (EGR) Sensor 'A' Circuit. It means the voltage signal from the EGR sensor is lower than the expected range.

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

Possible causes of the P0405 code include a faulty EGR sensor, damaged wiring or connectors in the EGR circuit, a clogged EGR valve, or issues with the EGR system's control module.

4. How can I diagnose the cause of the P0405 code in my Ford vehicle?

Diagnosing the P0405 code involves checking the EGR sensor for proper voltage signals, inspecting the wiring and connectors for damage, testing the EGR valve for blockages, and scanning the EGR system control module for any fault codes.

5. Can I continue driving my Ford vehicle with the P0405 code present?

It is not recommended to continue driving your vehicle with the P0405 code present, as it can lead to further damage to the engine and emission control systems. It is best to address the issue promptly.

6. How can I repair the P0405 code in my Ford vehicle?

To repair the P0405 code, you may need to replace the faulty EGR sensor, repair any damaged wiring or connectors, clean or replace the clogged EGR valve, or reset the EGR system control module.

7. Are there any DIY tips for fixing the P0405 code in a Ford vehicle?

While some simple checks like inspecting the wiring and connectors can be done DIY, diagnosing and repairing the P0405 code often requires professional knowledge and tools. It is recommended to consult a qualified mechanic.

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

Yes, a dirty or clogged EGR valve can restrict the flow of exhaust gases and cause the P0405 code to trigger due to improper sensor readings. Cleaning or replacing the EGR valve may resolve the issue.

9. How long does it typically take to repair the P0405 code in a Ford vehicle?

The repair time for the P0405 code can vary depending on the exact cause of the issue. Simple fixes like replacing a sensor or cleaning a valve may take a couple of hours, while more complex issues could take longer.

10. Will resetting the Check Engine Light make the P0405 code disappear permanently?

Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing the P0405 code is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the problem to prevent further issues.