P1401 2003 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 2003 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 2003 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 2003 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 2003 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 2003 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 2003 Ford F150 Code
1. What are the common symptoms of OBDII code P1401 on a 2003 Ford F150?
- Common symptoms include rough idling, poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.
2. What does the OBDII code P1401 on a 2003 Ford F150 indicate?
- OBDII code P1401 indicates an issue with the Differential Pressure Feedback EGR (DPFE) sensor circuit, specifically a high voltage condition.
3. What are the possible causes of OBDII code P1401 on a 2003 Ford F150?
- Possible causes include a faulty DPFE sensor, damaged or corroded wiring/connectors in the DPFE sensor circuit, or a problem with the EGR valve itself.
4. How can I diagnose the cause of OBDII code P1401 on my 2003 Ford F150?
- To diagnose the issue, you can perform a visual inspection of the DPFE sensor and its wiring, test the DPFE sensor using a multimeter, and check the EGR valve for proper operation.
5. Can I continue driving my 2003 Ford F150 with OBDII code P1401?
- It is not recommended to continue driving with OBDII code P1401 present, as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.
6. Is it possible to reset OBDII code P1401 on a 2003 Ford F150 without repairing the issue?
- While you can clear the code with an OBDII scanner, it is important to address the underlying problem causing the code to prevent it from reoccurring.
7. How much does it typically cost to repair OBDII code P1401 on a 2003 Ford F150?
- The cost of repair can vary depending on the specific cause of the issue, but it typically ranges from $100 to $300 for parts and labor.
8. Can I replace the DPFE sensor on my 2003 Ford F150 myself?
- Replacing the DPFE sensor is a relatively straightforward task that can be done by a DIY enthusiast with basic automotive repair skills and tools.
9. Are there any preventive measures I can take to avoid OBDII code P1401 on my 2003 Ford F150?
- Regular maintenance of the EGR system, including cleaning or replacing the DPFE sensor as recommended by the manufacturer, can help prevent issues leading to OBDII code P1401.
10. Will fixing OBDII code P1401 improve the overall performance of my 2003 Ford F150?
- Yes, addressing OBDII code P1401 and ensuring the proper functioning of the DPFE sensor and EGR system can improve engine performance, fuel efficiency, and overall drivability of the vehicle.
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