P1406 1998 Ford F150 Code - DPFE Sensor Circuit Downstream Hose
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 Downstream hose is disconnected, Downstream hose is plugged (ice), Plugged or damaged Exhaust Gas Recirculation (EGR) tube. 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
- P1406 1998 Ford F150 indicates DPFE Sensor Circuit Downstream Hose.
- Common causes
- Common causes include Downstream hose is disconnected, Downstream hose is plugged (ice), Plugged or damaged Exhaust Gas Recirculation (EGR) tube.
- 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 P1406 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 P1406 1998 Ford F150?
- Downstream hose is disconnected
- Downstream hose is plugged (ice)
- Plugged or damaged Exhaust Gas Recirculation (EGR) tube
- Faulty Differential Pressure Feedback Electronic (DPFE) sensor
- Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted
- Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection
How to Fix the DTC P1406 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 P1406 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 P1406 1998 Ford F150 Code
1. What are the common symptoms of OBDII code P1406 in a 1998 Ford F150 related to the DPFE Sensor Circuit Downstream Hose?
The common symptoms include rough idling, engine misfires, decreased fuel efficiency, and the illumination of the check engine light.
2. What does the OBDII code P1406 indicate in a 1998 Ford F150?
OBDII code P1406 in a 1998 Ford F150 signifies a fault in the DPFE (Differential Pressure Feedback EGR) sensor circuit downstream hose.
3. What are the possible causes of OBDII code P1406 in a 1998 Ford F150?
Common causes include a damaged or disconnected downstream hose, a faulty DPFE sensor, clogged EGR passages, or electrical issues within the sensor circuit.
4. How can I diagnose the issue causing OBDII code P1406 in a 1998 Ford F150?
You can diagnose the problem by visually inspecting the downstream hose for damage, checking the DPFE sensor for proper operation, and testing the EGR system for blockages.
5. Can I drive my 1998 Ford F150 with OBDII code P1406 present?
While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent potential damage to the engine and ensure optimal performance.
6. Is it safe to continue driving if the check engine light comes on due to OBDII code P1406 in a 1998 Ford F150?
It is generally safe to drive the vehicle if there are no other noticeable symptoms besides the illuminated check engine light. However, it is advisable to have the issue diagnosed and repaired as soon as possible.
7. How can I repair OBDII code P1406 related to the DPFE Sensor Circuit Downstream Hose in my 1998 Ford F150?
Repair options may include replacing the damaged hose, cleaning or replacing the DPFE sensor, clearing any EGR passages, or addressing any electrical faults in the sensor circuit.
8. Can I reset the OBDII code P1406 in my 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 the code from reoccurring and ensure proper vehicle operation.
9. How much does it typically cost to repair OBDII code P1406 in a 1998 Ford F150 at a professional mechanic's shop?
The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor, excluding any additional diagnostic fees.
10. Are there any preventative maintenance steps I can take to avoid OBDII code P1406 in my 1998 Ford F150?
Regularly inspecting the EGR system components, including the DPFE sensor and hoses, and addressing any issues promptly can help prevent the occurrence of OBDII code P1406.
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