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P1400 1999 FORD F150

P1400 1999 FORD F150 - Differential Pressure Feedback Electronic Sensor Circuit Low Voltage

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What does this mean?

P1400 1999 FORD F150 Possible Causes

  • 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

First diagnose P1400 1999 FORD F150 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

P1400 1999 FORD F150 Tech Notes

The EGR monitor checks the DPF EGR sensor signal to the PCM for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.

Cost of diagnosing the P1400 1999 FORD F150 code

    Labor: 1.0

    The cost of diagnosing the P1400 1999 FORD F150 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1400 1999 FORD F150 code detected?

Differential Pressure Feedback Electronic (DPFE) circuit low voltage detected

P1400 1999 FORD F150 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1400 1999 FORD F150 Meaning

The purpose of the Exhaust Gas Recirculation (EGR) system on your engine is to limit oxides of nitrogen (NOx) emissions. This is done by redirecting small amounts of exhaust gas back through the upper intake to get mixed in with the air/fuel charge. The resultant diluted air/fuel mixture (i.e., less oxygen per cubic foot) burns cooler and combustion chamber temperatures are reduced accordingly, thereby lowering NOx emissions.

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.

OBDII Code P1400 1999 FORD F150 - Differential Pressure Feedback Electronic Sensor Circuit Low Voltage - Engine-Codes.com

P1400 1999 FORD F150 More Information

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