AutoCodes – Ford – P1405 2001 Ford F150

P1405 2001 Ford F150 Code - DPF EGR Sensor Circuit High Voltage Detected

Quick Answer

The purpose of the Exhaust Gas Recirculation (EGR) system on your engine is to limit oxides of nitrogen (NOx) emissions. Common causes include Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor), Plugged or damaged EGR tube, Differential Pressure Feedback Electronic (DPFE) sensor 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: P1405 2001 Ford F150 indicates DPF EGR Sensor Circuit High Voltage Detected .
Common causes: Common causes include Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor), Plugged or damaged EGR tube, Differential Pressure Feedback Electronic (DPFE) sensor 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 9,864

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 Aug 19, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1405 2001 Ford F150 Description

The purpose of the Exhaust Gas Recirculation (EGR) system on your engine is to limit oxides of nitrogen (NOx) emissions. This is done by redirecting small amounts of exhaust gas back through the upper intake to get mixed in with the air/fuel charge. The resultant diluted air/fuel mixture (i.e., less oxygen per cubic foot) burns cooler and combustion chamber temperatures are reduced accordingly, thereby lowering NOx emissions.
The Ford DPFE/EGR system is controlled by the Powertrain Control Module (PCM). The system employs an EGR Valve, an Electronic Vacuum Regulator (EVR), and a Delta Pressure Feedback EGR sensor (DPFE).
The DPFE Sensor measures EGR flow across an orifice located inside the special EGR Tube. The orifice is positioned between two hose ports coming off the tube which is connected to the DPFE sensor with special heat-resistant hoses. When the EGR Valve is open, a pressure differential is created across the orifice (intake manifold pressure vs. exhaust pressure). By design, this difference in pressure is measured by the DPFE sensor in terms of voltage. The DPFE voltage signal output to the PCM is directly proportional to the flow of exhaust gas entering the intake manifold.

OBDII Code P1405 2001 Ford F150 - DPF EGR Sensor Circuit High Voltage Detected - AutoCodes.com — P1405 2001 Ford F150 Code - DPF EGR Sensor Circuit High Voltage Detected

What does this mean?

What are the Possible Causes of the DTC P1405 2001 Ford F150?

Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor)
Plugged or damaged EGR tube
Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted
Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1405 2001 Ford F150?

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 does this mean?

Code Tech Notes

The EGR monitor checks the DPF EGR sensor signal to the PCM for high voltage. The test fails when the average voltage to the PCM goes to a voltage greater than the maximum calibrated value.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1405 2001 Ford F150 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 P1405 2001 Ford F150 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 P1405 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1405 in a 2001 Ford F150?

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

2. What does the OBDII code P1405 "DPF EGR Sensor Circuit High Voltage Detected" mean in a 2001 Ford F150?

- This code indicates that the Differential Pressure Feedback Exhaust Gas Recirculation (DPFE) sensor circuit is detecting a higher than normal voltage.

3. What are the possible causes of the DPF EGR Sensor Circuit High Voltage Detected code in a 2001 Ford F150?

- Possible causes include a faulty DPFE sensor, damaged wiring or connectors in the sensor circuit, or issues with the EGR system.

4. How can I diagnose the OBDII code P1405 in my 2001 Ford F150?

- To diagnose this code, you can use a diagnostic scanner to retrieve the specific trouble code, visually inspect the DPFE sensor and related components, and perform voltage tests on the sensor circuit.

5. Can I continue driving my 2001 Ford F150 with the P1405 code present?

- It is not recommended to continue driving with this code present, as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

6. How can I repair the DPF EGR Sensor Circuit High Voltage Detected code in my 2001 Ford F150?

- Repair options may include replacing the DPFE sensor, repairing damaged wiring or connectors, cleaning out any clogs in the EGR system, or resetting the code after making necessary repairs.

7. Will resetting the trouble code make it go away permanently?

- Resetting the trouble code may temporarily turn off the Check Engine Light, but if the underlying issue causing the code is not fixed, the code will likely return.

8. Are there any maintenance tips to prevent the DPF EGR Sensor Circuit High Voltage Detected code in a 2001 Ford F150?

- Regularly inspecting and cleaning the EGR system components, checking for damaged wiring, and ensuring proper functioning of the DPFE sensor can help prevent this code from occurring.

9. Can a clogged EGR valve cause the P1405 code in a 2001 Ford F150?

- Yes, a clogged EGR valve can disrupt the proper operation of the EGR system and lead to the detection of high voltage in the DPFE sensor circuit, triggering the P1405 code.

10. Is it necessary to visit a mechanic to diagnose and repair the P1405 code in a 2001 Ford F150?

- While it is possible to diagnose and repair this code yourself if you have the necessary tools and knowledge, seeking professional help from a mechanic experienced in dealing with EGR system issues is recommended for accurate diagnosis and proper repairs.