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P1401 Ford Code - DPFE Sensor Circuit High

Quick Answer

The P1401 Ford code indicates that there is a problem with the Differential Pressure Feedback Exhaust (DPFE) sensor circuit, specifically that the sensor is reading a high voltage. Common causes include Faulty DPFE sensor, Damaged wiring or connectors in the DPFE sensor circuit, Clogged EGR system. 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
P1401 Ford indicates DPFE Sensor Circuit High.
Common causes
Common causes include Faulty DPFE sensor, Damaged wiring or connectors in the DPFE sensor circuit, Clogged EGR system.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P1401 Ford Description

The P1401 Ford code indicates that there is a problem with the Differential Pressure Feedback Exhaust (DPFE) sensor circuit, specifically that the sensor is reading a high voltage. The DPFE sensor is a crucial component of the vehicle's exhaust gas recirculation (EGR) system, which helps reduce emissions and improve fuel efficiency. When the DPFE sensor circuit reads a high voltage, it can lead to issues with the EGR system, causing the vehicle to run inefficiently and produce higher emissions. If not addressed, this issue can result in decreased fuel economy, engine performance issues, and potential damage to the catalytic converter.

OBDII Code P1401 Ford - DPFE Sensor Circuit High
P1401 Ford Code - DPFE Sensor Circuit High

Common Causes of P1401 Ford

  1. Faulty DPFE sensor
  2. Damaged wiring or connectors in the DPFE sensor circuit
  3. Clogged EGR system
  4. Vacuum leaks in the EGR system
  5. PCM (Powertrain Control Module) software issues

Symptoms of P1401 Ford

  1. Check Engine Light illuminated on the dashboard
  2. Reduced fuel efficiency
  3. Engine misfires or rough idling
  4. Increased emissions
  5. Lack of power when accelerating

How to Fix P1401 Ford

  1. Begin by verifying the code with a diagnostic scan tool.
  2. Inspect the DPFE sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Clean or replace the DPFE sensor if necessary.
  4. Check and clear any blockages in the EGR system.
  5. Reset the PCM and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1401 Ford

The cost of repairing a P1401 Ford code can vary depending on the specific cause of the issue. In general, the cost of replacing a DPFE sensor can range from $100 to $200, including parts and labor. Additional costs may apply if there are other components in the EGR system that require attention. It's important to factor in diagnostic time and labor rates, which can vary based on location and the repair shop chosen. It's recommended to consult with a trusted mechanic for a more accurate cost estimate.

What does this mean?

Tech Notes for P1401 Ford

There is a factory service bulletin for the following Ford models:

2000-2002 Ford Taurus
2001-2002 Ford Crown Victoria
2001-2002 Ford Focus
2001-2002 Ford Mustang
2001 Ford Explorer USPS
2001-2002 Ford E Series
2001-2002 Ford Escape
2001-2002 Ford Expedition
2001-2002 Ford Explorer Sport Trac
2001-2002 Ford Explorer Sport
2001-2002 Ford F-150
2001-2002 Ford Ranger
2001-2002 Ford Windstar
2002-2003 Ford Explorer
Ford Factory Service Bulletin OBDII Code P1401 Code

Sensor replacement procedure 2001 Ford Focus:





Note: User Submitted Video

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Information for Specific Ford Models

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 P1401 Ford Code

1. What are the common symptoms of OBDII code P1401 (Ford) related to the DPFE Sensor Circuit High?

- Common symptoms include rough idling, engine hesitation, decreased fuel efficiency, and even stalling.

2. What can cause the DPFE Sensor Circuit High trouble code (P1401) on a Ford vehicle?

- The most common causes are a faulty DPFE sensor, damaged wiring or connectors, or a clogged EGR system.

3. How can I diagnose the DPFE Sensor Circuit High issue (P1401) in my Ford vehicle?

- Use a multimeter to test the DPFE sensor's voltage and resistance, inspect the sensor and its connections for damage, and check the EGR valve for clogs or malfunctions.

4. Is it safe to continue driving with the P1401 code triggered in my Ford vehicle?

- It is not recommended to drive for an extended period with this code as it can lead to further engine damage and poor performance.

5. Can a dirty EGR valve cause the DPFE Sensor Circuit High code (P1401) in a Ford vehicle?

- Yes, a dirty or clogged EGR valve can disrupt the flow of exhaust gases and trigger the P1401 code.

6. How can I repair the DPFE Sensor Circuit High issue (P1401) in my Ford vehicle?

- Repair options include replacing the DPFE sensor, cleaning or replacing the EGR valve, checking and repairing any damaged wiring or connectors.

7. Will resetting the OBDII system clear the P1401 code related to the DPFE Sensor Circuit High in my Ford vehicle?

- Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

8. Can a DIY enthusiast fix the DPFE Sensor Circuit High problem (P1401) in a Ford vehicle?

- Depending on your experience and access to tools, it is possible to diagnose and repair this issue yourself, especially if you have some mechanical knowledge.

9. What is the function of the DPFE sensor in a Ford vehicle's EGR system?

- The DPFE sensor measures the flow and pressure of exhaust gases in the EGR system, helping the engine control module adjust fuel delivery and reduce emissions.

10. How crucial is it to address the DPFE Sensor Circuit High issue (P1401) promptly in a Ford vehicle?

- It is essential to address this issue promptly to prevent further engine damage, maintain optimal performance, and ensure compliance with emissions regulations.

Discuss the causes and fixes for P1401 Ford OBDII Code

Submit a New Comment

  • I wanted to add my experience, since this code (P1401) has been hounding me for quite some time. I tried all of the usual fixes first of course.. Replaced the DPFE with one from a junkyard. That didn't work, code came back as soon as I cleared it. Broke down (figuratively, this never actually rendered my truck inoperable. Even when I had the DPFE sensor completely unplugged) and bought a new DPFE sensor, and those things aren't cheap for a 2000 2.5L. I think it set me back over $70. That still didn't fix it. After doing quite a bit more research, I found that the EGR system could get clogged with carbon build-up which has been known to trigger this code. Just to be completely safe, I replaced the EGR valve itself, the EGR tube, and cleaned the ports they connect to really well with carb cleaner. Reset the code, and bam right back on.

    I had already visually inspected all of the wires, but since the code itself makes me think electrical I decided to go a bit further. I very gently tugged on the wires coming out of the harness that plugs into the DPFE sensor. One came out with absolutely no effort, and another came out fairly easily. I suppose this could explain why replacing the DPFE sensor "fixes" the problem temporarily for some people. Handling the harness when unplugging and plugging it in might give the wire just enough contact for a little while.

    The parts store wanted over $30 for a new harness, so I went around at a junk yard until I found one in which I could tug all three wires fairly aggressively and they were in there really well. Unplugged the harness, cut off enough wire to splice it to my old wires, and the problem has been fixed ever since for $2. Well, at least I have a whole new EGR system now! I guess that can't be bad for mileage.

    Reply to Comment

  • Thank you for the information!

    Reply to Comment