P1400 1999 Ford F150 Code - Differential Pressure Feedback Electronic Sensor Circuit Low Voltage
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 Differential Pressure Feedback Electronic Sensor harness is open or shorted, Differential Pressure Feedback Electronic Sensor circuit poor electrical connection, Faulty Differential Pressure Feedback Electronic Sensor. 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
- P1400 1999 Ford F150 indicates Differential Pressure Feedback Electronic Sensor Circuit Low Voltage.
- Common causes
- Common causes include Differential Pressure Feedback Electronic Sensor harness is open or shorted, Differential Pressure Feedback Electronic Sensor circuit poor electrical connection, Faulty Differential Pressure Feedback Electronic Sensor.
- 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 P1400 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 P1400 1999 Ford F150?
- Differential Pressure Feedback Electronic Sensor harness is open or shorted
- Differential Pressure Feedback Electronic Sensor circuit poor electrical connection
- Faulty Differential Pressure Feedback Electronic Sensor
- Damaged PCM
How to Fix the DTC P1400 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 P1400 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 P1400 1999 Ford F150 Code
1. What are the common symptoms of OBDII code P1400 in a 1999 Ford F150?
- Common symptoms include rough idling, poor engine performance, decreased fuel efficiency, and an illuminated check engine light.
2. What causes the Differential Pressure Feedback Electronic (DPFE) sensor circuit to have low voltage in a 1999 Ford F150?
- The low voltage in the DPFE sensor circuit can be caused by a faulty DPFE sensor, damaged wiring, or a problem with the EGR system.
3. How can I diagnose the cause of OBDII code P1400 in my 1999 Ford F150?
- Diagnosis typically involves checking the DPFE sensor for proper operation, inspecting the sensor's wiring for damage, and testing the EGR system components for faults.
4. Is it safe to continue driving my 1999 Ford F150 with OBDII code P1400?
- It is not recommended to drive your vehicle with OBDII code P1400, as it can lead to poor engine performance and potential damage to other components.
5. Can I repair OBDII code P1400 in my 1999 Ford F150 on my own?
- Depending on your level of automotive knowledge, you may be able to repair OBDII code P1400 on your own by replacing the DPFE sensor, repairing damaged wiring, or cleaning the EGR system.
6. How much does it typically cost to fix OBDII code P1400 in a 1999 Ford F150?
- The cost of repairing OBDII code P1400 can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.
7. Are there any maintenance tips to prevent OBDII code P1400 from occurring in my 1999 Ford F150?
- Regularly inspecting and cleaning the EGR system components, as well as ensuring proper maintenance of the DPFE sensor, can help prevent OBDII code P1400 from occurring.
8. Can a dirty or clogged EGR valve cause OBDII code P1400 in a 1999 Ford F150?
- Yes, a dirty or clogged EGR valve can disrupt the operation of the EGR system, leading to issues with the DPFE sensor circuit and triggering OBDII code P1400.
9. Will resetting the check engine light resolve OBDII code P1400 in my 1999 Ford F150?
- Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing OBDII code P1400. The problem should be diagnosed and repaired to prevent the code from reoccurring.
10. Can a malfunctioning DPFE sensor cause engine misfires in a 1999 Ford F150?
- Yes, a malfunctioning DPFE sensor can cause engine misfires due to improper feedback to the engine control module, leading to incorrect fuel and air mixture ratios.
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