How do i replace a egr pressure feedback sensor on a 1999 ford ranger

Definition of Diagnostic Trouble Code P1406 Audi: EGR Temperature Sensor Range/Performance BMW: Heated Catalyst Internal Control Module Checksum/ROM Error Buick: EGR Valve Pintle Position Circuit Cadillac: EGR Valve Pintle Position Circuit Chevrolet: EGR Valve Pintle Position Circuit Ford: Differential Pressure Feedback Sensor Downstream Hose Off Or Plugged GMC: EGR Valve Pintle Position Circuit Isuzu: EGR Valve Pintle Position Circuit Lincoln: Differential Pressure Feedback Sensor Downstream Hose Off Or Plugged Mazda: DPFE Sensor Downstream Hose Off Or Plugged Mercury: Differential Pressure Feedback Sensor Downstream Hose Off Or Plugged Oldsmobile: EGR Valve Pintle Position Circuit Pontiac: EGR Valve Pintle Position Circuit Saturn: EGR Valve Pintle Position Circuit Toyota: Turbo Pressure Sensor Range/Performance Problem Volkswagen: EGR Temperature Sensor Range/Performance Volvo: Termperature Warning > 100 degrees C

Probably partially clogged tube, or sludge build up in intake manifold. Must take apart and look in these areas. I assume this is a high mileage vehicle.

(DPFE egr pressure sensor )sensor or lines going to sensor are bad. replace sensors or lines.If this is helpful please leave me good feedback

P1401 FORD - DPFE Sensor Circuit High
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. This is not likely the EGR but the EGR pressure sensing valve.

i would start looking for vacuum leaks first,

Exhaust Gas Recirculation (EGR) System The exhaust gas recirculation (EGR) system is designed to:

• reintroduce exhaust gas into the combustion cycle.
• lower combustion temperatures.
• reduce the formation of oxides or nitrogen (NOX).

The amount of exhaust gas reintroduced and the timing of the cycle varies by calibration. Timing and volume are controlled by the following:

• engine rpm
• engine vacuum
• exhaust system back pressure
• engine coolant temperature
• air charge temperature
• throttle position

The EGR valve (EGR valve) (9D475) is vacuum-actuated. The vacuum hose routing diagram is shown on the Vehicle Emission Control Information (VECI) decal. The EGR system is a differential pressure feedback EGR Sensor system. Differential pressure feedback EGR Sensor is a subsonic closed loop EGR system. The differential pressure feedback EGR system:

• monitors EGR flow rate by the pressure drop across the metering orifice located in the EGR tube.
• uses a differential pressure feedback EGR sensor as the feedback device.
• uses the EGR valve only as a pressure regulator, rather than a flow metering device.
• controlled pressure is varied by the valve movement using vacuum output of the EGR vacuum regulator solenoid (9J459).
• allows for a more accurate assessment of EGR flow requirements.

Differential Pressure Feedback EGR Flow Diagram




Differential Pressure Feedback EGR Sensor Removal

1. Disconnect engine control sensor wiring (12A581) from Differential Pressure Feedback EGR Sensor.
   

1. Disconnect Differential Pressure Feedback EGR Sensor hoses from EGR valve to exhaust manifold tube (9D477).
   

1. Remove retaining nuts or bolts (depending upon application) and EGR Differential Pressure Feedback transducer.
   

Installation

1. Follow removal procedure in reverse order.
   

1. Tighten retaining nuts or bolts (depending upon application) to 5-7 Nm (45-61 lb-in).
   
   
   Differential Pressure Feedback EGR Sensor, 3.0L (2V) Engine
   
   
   
   
   
   
   Differential Pressure Feedback EGR Sensor, 3.0L (4V) Engine
   
   
   
   
   
   Item Part Number Description 1 6049 RH Cylinder Head 2 - Differential Pressure Feedback EGR Sensor 3 - Nut (2 Req'd) 4 - Stud Bolt 5 - Bolt (2 Req'd) 6 - Differential Pressure Feedback EGR Sensor Bracket A - Tighten to 5-7 Nm (45-61 Lb-In) B - Tighten to 8-12 Nm (71-106 Lb-In)
   
   Engine Emission Control Component Location-3.4L SHO Engine
   
   
   
   
   
   Item Part Number Description 1 95607-05200 Nut 2 - EGR Sensor Hose 3 - EGR Sensor Hose 4 95027-08016 Bolt 5 - Differential Pressure Feedback EGR Sensor 6 9J433 Differential Pressure Feedback EGR Sensor Mounting Bracket 7 9D474 EGR Solenoid Vacuum Valve (2 Req'd) 8 A4670 Vacuum Tube Assembly 9 9424 Intake Manifold 10 9J459 EGR Vacuum Regulator Solenoid A - Tighten to 5-7 Nm (45-61 Lb-In)

Hope this helps

The code P1400 reads "DPFE Sensor Voltage Low" (Ford, Mazda). Often it's caused by a bad DPFE sensor or clogged EGR passages. DPFE stands for (Differential Pressure Feedback EGRI) I would clean the EGR valve which cost nothing. If that does not cure the problem, you may need to replace the DPFE sensor, which does cost, and it may not fix the problem. If you want to be sure you replace the correct part, then visit your local Ford dealer.

That would be exhaust gas recirculation flow Excessive That is you EGR valve it is malfunctioning might consider having it replaced.John

The DPFE sensor is a very common failure on all Ford models. Just have the sensor replaced. Or do it yourself. It is very easy to change you can do it in 10 minutes.

The egr valve has two sensors. One is an EGR position sensor which is physically attached to the EGR valve. The other sensor is the DPFE (Delta Pressure Feedback EGR) sensor, commonly called the EGR pressure sensor. It's location varies depending on the engine you have. You can fine this sensor by following the vacuum hose on the EGR valve. It will be with in inches of the EGR valve. The sensor will be black (plastic) or silver (metal), have two or three vacuum ports and an electrical connection on it.

The vacuum pressure sensor is a high failure item on fords. Any Ford parts department will have one in stock, as well as some aftermarket parts stores.

The new sensor may not look exactly the same as the old part, but will have all the hook ups as the old one. You may also need to replace the vacuum hose to the sensor as well