AutoCodes – Ford – P040C Ford

P040C Ford Code - Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low

Quick Answer

The Engine Control Module (ECM) monitors the Exhaust Gas Recirculation (EGR) Temperature Sensor 'A' Circuit Performance, which measures the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Recirculation Temperature Sensor 'A', Exhaust Gas Recirculation Temperature Sensor 'A' harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 'A' circuit poor electrical connection. 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: P040C Ford indicates Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Temperature Sensor 'A', Exhaust Gas Recirculation Temperature Sensor 'A' harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 'A' circuit poor electrical connection.
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 4,173

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P040C Ford Description

The Engine Control Module (ECM) monitors the Exhaust Gas Recirculation (EGR) Temperature Sensor 'A' Circuit Performance, which measures the temperature of the exhaust gas. The EGR Temperature Sensor functions by increasing the resistance with increasing exhaust gas temperature. The ECM sets the OBDII code when the EGR Temperature Sensor signal is not to factory specifications.

OBDII Code P040C Ford - Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low - AutoCodes.com — P040C Ford Code - Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P040C Ford?

Faulty Exhaust Gas Recirculation Temperature Sensor 'A'
Exhaust Gas Recirculation Temperature Sensor 'A' harness is open or shorted
Exhaust Gas Recirculation Temperature Sensor 'A' circuit poor electrical connection

How to Fix the DTC P040C 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 P040C 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.

Need more information about the P040C Ford code?

Need more information on how to fix the P040C Ford code? Get Access to Factory Service Manuals

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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 P040C Ford Code

1. What are the common symptoms of OBDII code P040C in a Ford vehicle?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P040C in a Ford indicate?

- The code P040C indicates a potential issue with the Exhaust Gas Recirculation (EGR) Temperature Sensor 'A' Circuit being too low.

3. What are the possible causes of the OBDII code P040C in a Ford?

- The code P040C can be triggered by a faulty EGR temperature sensor, damaged wiring or connectors, a malfunctioning EGR valve, or issues with the vehicle's computer system.

4. How can I diagnose the cause of OBDII code P040C in my Ford?

- Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the EGR temperature sensor and its circuit for continuity, inspecting wiring for damage, and testing the EGR valve for proper functioning.

5. Can I continue driving my Ford with the OBDII code P040C present?

- It is not recommended to drive with the code P040C present as it can lead to further engine damage and reduced performance. It's best to address the issue promptly.

6. How can I repair the OBDII code P040C in my Ford?

- Repair options may include replacing the EGR temperature sensor, repairing damaged wiring or connectors, addressing issues with the EGR valve, or reprogramming the vehicle's engine control module.

7. Are there any DIY tips for fixing the OBDII code P040C in my Ford?

- DIY tips may include checking and cleaning the EGR system components, inspecting and repairing any visible wiring issues, and ensuring proper connections of the EGR temperature sensor.

8. Can a faulty EGR temperature sensor cause other problems in my Ford besides triggering the P040C code?

- Yes, a faulty EGR temperature sensor can potentially cause poor engine performance, increased emissions, and other related issues if left unaddressed.

9. How much does it typically cost to fix the OBDII code P040C in a Ford at a repair shop?

- The cost of fixing the P040C code can vary depending on the exact cause of the issue, but it may range from $100 to $400 or more, including parts and labor.

10. How often does the OBDII code P040C occur in Ford vehicles?

- The occurrence of the P040C code in Ford vehicles can vary, but it is not uncommon, especially in older models or vehicles with high mileage.