P1401 1997 Ford F150 Code - DPFE Sensor Circuit High
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, Differential Pressure Feedback Electronic sensor harness is open or shorted, Differential Pressure Feedback Electronic sensor 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
- P1401 1997 Ford F150 indicates DPFE Sensor Circuit High.
- Common causes
- Common causes include Faulty Differential Pressure Feedback Electronic (DPFE) sensor, Differential Pressure Feedback Electronic sensor harness is open or shorted, Differential Pressure Feedback Electronic sensor 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.
Code P1401 1997 Ford F150 Description
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 are 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.
What are the Possible Causes of the DTC P1401 1997 Ford F150?
- Faulty Differential Pressure Feedback Electronic (DPFE) sensor
- Differential Pressure Feedback Electronic sensor harness is open or shorted
- Differential Pressure Feedback Electronic sensor circuit poor electrical connection
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P1401 1997 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1401 1997 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.
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Frequently Asked Questions about P1401 1997 Ford F150 Code
1. What are common symptoms of OBDII code P1401 in a 1997 Ford F150?
- Common symptoms include rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What does the OBDII code P1401 on a 1997 Ford F150 indicate?
- The code P1401 indicates an issue with the DPFE (Differential Pressure Feedback EGR) sensor circuit being too high.
3. What are possible causes of the DPFE Sensor Circuit High error code in a 1997 Ford F150?
- Possible causes include a faulty DPFE sensor, damaged wiring or connectors in the DPFE circuit, or a clogged EGR system.
4. How can I diagnose the DPFE sensor circuit high issue in my 1997 Ford F150?
- Diagnose the issue by checking the DPFE sensor for proper operation, inspecting the wiring and connectors for damage, and ensuring the EGR system is clean and functioning correctly.
5. Can I drive my 1997 Ford F150 with the P1401 code present?
- It is not recommended to drive with the P1401 code present as it may lead to poor engine performance and potential damage to the EGR system.
6. How can I repair the DPFE sensor circuit high issue in my 1997 Ford F150?
- Repair options include replacing the DPFE sensor if faulty, repairing any damaged wiring or connectors, and cleaning or replacing the EGR system components if necessary.
7. Is it possible to reset the P1401 code in a 1997 Ford F150 without fixing the issue?
- While you can clear the code temporarily, it is recommended to address the underlying problem causing the P1401 code to prevent further issues.
8. Can a DIY enthusiast fix the DPFE sensor circuit high problem in a 1997 Ford F150?
- Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the DPFE sensor circuit high issue in a 1997 Ford F150.
9. How much does it typically cost to repair the DPFE sensor circuit high issue in a 1997 Ford F150?
- The cost of repairing the DPFE sensor circuit high problem can vary based on the extent of the issue, but it generally ranges from $100 to $300, including parts and labor.
10. Will the P1401 code in a 1997 Ford F150 cause the vehicle to fail an emissions test?
- Yes, the P1401 code related to the DPFE sensor circuit high can cause the vehicle to fail an emissions test due to improper EGR system operation.
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