Question about 1996 Ford Explorer

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96, 4.0L ford explorer

How can i go about resetting the codes after i have replaced the dpfe sensor

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Disconnect the battery for 1 minute and connect it back on.

Posted on Jan 01, 2009

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Code PO401


Exhaust gas recirculation module check:


1. Note the Differential Pressure Feedback Exhaust Gas Recirculation (DPFE) sensor voltage through the scan tool or backprobe the Brown/Light Green (BN/LG) wire of the Exhaust Gas Recirculation System Module (ESM). Voltage should indicate a reading of 0.5-1.2 volts.

2. If the voltage of the DPFE sensor is out of range, low or high, disconnect the ESM and note that the voltage of the DPFE sensor circuit should indicate a reading of 5.0 volts.

3. If the DPFE sensor voltage is out of range connected and the reading shows 5.0 volts with the ESM disconnected, reconnect the ESM and verify that the Brown/White (BN/WH) wire shows a 5.0 volt reading and that the Grey/Red (GY/RD) wire shows to be a good ground, indicating a voltage of less than 0.1 volts. If these circuits check to be ok, replace the ESM due to a faulty DPFE sensor.

4. If the DPFE sensor voltage in step 1 is found to be ok, verify that both vacuum hoses to the ESM have full engine vacuum to them when it's running.

5. With the engine idling, backprobe the Brown/Pink (BN/PK) wire and hold it to ground. This should activate the Exhaust Gas Recirculation Vacuum Regulator (EVR) solenoid of the ESM. The EGR valve should open, the engine should run rough, and the DPFE sensor voltage should climb.

6. Replace the ESM for a faulty EGR valve, EVR solenoid, or DPFE sensor if the DPFE sensor or engine does not respond to ground activation of the BN/PK wire

Nov 10, 2013 | 2004 Ford Explorer

3 Answers

My 2002 Ford Explorer gave me code P1400. What does it mean


P1400 indicates the following:
Differential Pressure Feedback Electronic Sensor circuit Low Voltage

Most common cause is a bad DPFE sensor.

Jul 15, 2011 | 2002 Ford Explorer

2 Answers

I have a sensor on an 03 Ford Explorer...part # 4u7e-9j460-aa7d19aj397m7997. What sensor is this?


This is the DPFE(Delta Pressure Feedback) sensor. Some places may call it an EGR(Exhuast Gas Recirculation) sensor but that's not really what it is.

Mar 29, 2011 | 2003 Ford Explorer

1 Answer

Either code 4000 or 1400 on 2002 ford ranger 4.0 ltr v6. the right code should equate to the egr valve. I have replaced the egr valve but check engine light comes on again after reset showing same code.


code p1400 is a DPF EGR sensor CIRCUIT LOW VOLTAGE detected. most likely is a problem with the wiring to the egr or dpfe sensor. the pinpoint tests for code p1400 instruct you to test all wiring before replaceing the egr or dpfe sensor

Jan 19, 2011 | 2002 Ford Ranger Regular Cab

1 Answer

Code p0401 i replaced egr tested omhs@voltage on all related parts @reset code still comes on ?


What have you replaced the EGR valve or the DPFE sensor. The valve usually never goes bad it is usually the DPFE sensor that is bad or the ports in the intake elbow that the valve is bolted to are plugged. If the DPFE tests good pull the elbow and clean the ports. Do you have a vacuum pump?

Dec 10, 2010 | 2000 Ford F150 Flareside SuperCab

2 Answers

PO402 trouble code....how is this repaired


Exhaust gas recirculation flow excessive. First things to check is your vacuum hoses to egr position sensor (Dpfe sensor) Egr solenoid & egr valve. If they are off, melted or sucked in they need to be replaced. Usually a specific code will be set for that but not always. Of the three the dpfe sensor also known as egr position sensor is the most common & easiest to replace. Next in order is the egr solenoid. Lastly if it comes to changing egr valve make sure to clean all carbon build up in cavity that egr mounts to. They commonly plug up.

Sep 24, 2010 | 2002 Ford Explorer Sport

1 Answer

Code 402 and 403 having to do with egr and dpfe sensor. Were are they located?


Dpfe sensor is usually on driver side intake manifold or on a bracket attached to it. It has 2 vacuum ports & a electrical plug. Look for cracked or broken vauum hoses going to it. I would fix any broken vacuum hoses, if none change the dpfe sensor(aka:egr position sensor) only & it will usually cure both codes.

Jul 05, 2010 | 1996 Ford Explorer

1 Answer

Get a p1400 code check engine light


P1400 - DPFE (Differential Pressure Feedback Electronic) Sensor circuit Low Voltage

The DPFE sensor is usually not hard to change. There are 2 small rubber hoses that run from the EGR tube to it...

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Replace DPFE sensor, reset engine fault codes. The Ford one is a good one and rockauto.com carries Airtex. Sometimes I hear that this change always need replace EGR valve to delet all codes. Test it.

Good luck.

Jul 07, 2010 | 2002 Ford Explorer Sport Trac

3 Answers

1998 ford escort code P0401 I need to know what this code is for. Thank You.


This code is an EGR code for insufficient amount of egr. It could be that the egr tube is clogged or the egr itself is bad or there is not enough vacuum to open the egr properly. There is also a sensor called the DPFE(differential pressure feedback egr) is faulty.

Jun 25, 2010 | 1998 Ford Explorer

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