P1400 2002 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 2002 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 2002 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 2002 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 2002 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
There is a factory service bulletin for the 2001 Ford F-150:
2002 Ford F-150 Factory Service Bulletin OBDII Code P1400 Code
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1400 2002 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.
Need more information about the P1400 2002 Ford F150 code?
Need more information on how to fix the P1400 2002 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1400 2002 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1400 2002 Ford F150 Code
1. What does the OBDII code P1400 mean on a 2002 Ford F150?
P1400 indicates a "Differential Pressure Feedback Electronic (DPFE) Sensor Circuit Low Voltage," which means the engine control module (ECM) is detecting a low voltage signal from the DPFE sensor.
2. What are the common symptoms of code P1400 on a 2002 Ford F150?
Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, hesitation during acceleration, and the check engine light turning on.
3. What causes the P1400 code on a 2002 Ford F150?
The most common causes are a faulty DPFE sensor, damaged or disconnected sensor wiring, clogged or leaking EGR passages, or a malfunctioning EGR valve.
4. How do I diagnose code P1400 on my 2002 Ford F150?
Start by checking the DPFE sensor and its wiring for damage or loose connections. Inspect the EGR system for blockages or leaks and use a multimeter to test the voltage output of the sensor.
5. Can a bad DPFE sensor cause drivability issues in my Ford F150?
Yes, a faulty DPFE sensor can result in improper EGR operation, leading to issues like poor acceleration, rough idling, and decreased fuel economy.
6. How do I fix code P1400 on my 2002 Ford F150?
Repairs may include replacing the DPFE sensor, repairing or replacing damaged wiring, cleaning clogged EGR passages, or replacing the EGR valve if necessary.
7. Is it safe to drive my 2002 Ford F150 with a P1400 code?
While the truck may still be drivable, ignoring the issue can lead to decreased performance, poor fuel economy, and potential damage to the engine over time.
8. How much does it cost to repair a P1400 code on a 2002 Ford F150?
Replacing the DPFE sensor typically costs between $100 and $250, including parts and labor. Additional repairs, like EGR cleaning or valve replacement, may increase costs.
9. Can I reset the P1400 code without fixing the issue?
You can clear the code with a scan tool, but it will likely return if the underlying issue isn’t resolved.
10. What tools do I need to troubleshoot the P1400 code on my 2002 Ford F150?
You’ll need an OBDII scanner, a multimeter for voltage testing, and basic hand tools to inspect and replace components.
Discuss the causes and fixes for P1400 2002 Ford F150 OBDII Code
Code P1400 2002 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
