P1401 Lincoln 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 Lincoln 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 Lincoln 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 Lincoln?
- 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 Lincoln?
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
2001 Lincoln Town Car
2002 Lincoln Town Car
2001-2002 Lincoln Town Car Factory Service Bulletin OBDII Code P1401 Code
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1401 Lincoln 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 Lincoln Code
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