P1401 1999 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 1999 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 1999 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 1999 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 1999 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 1999 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 1999 Ford F150 Code
1. What are the common symptoms of OBDII code P1401 (DPFE Sensor Circuit High) on a 1999 Ford F150?
- Common symptoms include rough idling, poor fuel efficiency, engine misfires, and the illumination of the Check Engine Light.
2. What can cause the DPFE Sensor Circuit High code on a 1999 Ford F150?
- The code P1401 can be triggered by a faulty DPFE sensor, damaged wiring or connectors in the DPFE circuit, or a problem with the EGR valve itself.
3. How can I diagnose the DPFE Sensor Circuit High issue on my 1999 Ford F150?
- Diagnosis typically involves checking the DPFE sensor and its connections for damage, testing the EGR valve for proper operation, and inspecting the wiring for any shorts or breaks.
4. Can I drive my 1999 Ford F150 with the P1401 code present?
- It is generally not recommended to drive with the P1401 code active, as it can lead to reduced engine performance and potential damage to other components over time.
5. What are some repair tips for fixing the DPFE Sensor Circuit High problem on a 1999 Ford F150?
- Repair tips include replacing the DPFE sensor if faulty, repairing any damaged wiring or connectors, cleaning or replacing the EGR valve, and clearing the trouble codes after repairs are completed.
6. How much does it typically cost to repair the P1401 code on a 1999 Ford F150?
- The cost of repairing the P1401 code can vary depending on the root cause of the issue, but it could range from $100 to $300 for parts and labor.
7. Will disconnecting the battery reset the P1401 code on a 1999 Ford F150?
- Disconnecting the battery may temporarily clear the code, but it is recommended to diagnose and repair the underlying issue to prevent the code from reappearing.
8. Can a DIY enthusiast fix the DPFE Sensor Circuit High problem on a 1999 Ford F150?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the P1401 code, especially if it involves simple tasks like sensor replacement or wiring repairs.
9. How long does it take to repair the P1401 code on a 1999 Ford F150?
- The repair time for the P1401 code can vary, but it may take anywhere from 1 to 3 hours to diagnose and fix the issue, depending on the complexity of the problem.
10. Will the P1401 code cause my 1999 Ford F150 to fail an emissions test?
- Yes, the P1401 code typically indicates a problem with the EGR system, which is crucial for emissions control. Therefore, it may cause your vehicle to fail an emissions test until the issue is resolved.
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