P1401 1998 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 1998 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 1998 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 1998 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 1998 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 1998 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 1998 Ford F150 Code
1. What are the common symptoms of OBDII code P1401 on a 1998 Ford F150 related to the DPFE sensor circuit high?
- Common symptoms include rough idling, decreased fuel efficiency, and potential stalling of the engine.
2. What does the DPFE sensor do in a 1998 Ford F150?
- The Differential Pressure Feedback EGR (DPFE) sensor in a 1998 Ford F150 measures the pressure difference between the exhaust gas recirculation (EGR) valve and the intake manifold.
3. What are the possible causes of a DPFE sensor circuit high fault code on a 1998 Ford F150?
- Potential causes include a faulty DPFE sensor, damaged wiring or connectors, a clogged EGR system, or issues with the EGR valve itself.
4. How can I diagnose a DPFE sensor circuit high issue on my 1998 Ford F150?
- To diagnose this issue, you can visually inspect the DPFE sensor and its connections, test the sensor's voltage output, and check for any obstructions in the EGR system.
5. Can I drive my 1998 Ford F150 with an active P1401 code related to the DPFE sensor circuit high?
- It is generally not recommended to drive with an active P1401 code, as it can lead to poor engine performance and potential damage if not addressed promptly.
6. How can I repair a DPFE sensor circuit high fault code on my 1998 Ford F150?
- Repair options include replacing the DPFE sensor, repairing or replacing damaged wiring, cleaning out the EGR system, and ensuring proper operation of the EGR valve.
7. Is it possible to reset the OBDII code P1401 on a 1998 Ford F150 without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent it from recurring.
8. Can a DIY enthusiast with basic automotive knowledge fix a DPFE sensor circuit high issue on a 1998 Ford F150?
- Yes, with the right tools and guidance, DIY enthusiasts can often diagnose and repair DPFE sensor circuit high issues on a 1998 Ford F150.
9. How much does it typically cost to repair a DPFE sensor circuit high fault on a 1998 Ford F150 at a mechanic or dealership?
- Costs can vary, but typically, the repair for a DPFE sensor circuit high fault on a 1998 Ford F150 can range from $100 to $300, depending on the exact cause and parts needed.
10. What are the long-term consequences of ignoring a DPFE sensor circuit high fault code on a 1998 Ford F150?
- Ignoring a DPFE sensor circuit high fault can lead to reduced engine efficiency, increased emissions, and potential damage to other engine components over time.
Discuss the causes and fixes for P1401 1998 Ford F150 OBDII Code
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I am having this problem with my 98 ford but I don't understand how to fix this problem?
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The most common problem for the P1401 is the DPFE Sensor. Replacing the sensor should take care of the problem.
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