Question about 2001 Ford Escape

1 Answer

2002 Ford Escape (V6) P0401 P0402 nightmare

2002 Ford Escape (V6)

Replaced DPFE sensor 1 year ago when CEL came on.

2 months ago, CEL came on (P0401). Voltage checked DPFE sensor, was bad, replaced again.

Last week, CEL came on P0402. Voltage checked DPFE sensor (ignition on/engine off ~.9V, engine on, valve closed stayed at .9V, valve open, went up close to 4.0V).

Took EGR system apart, looked very clean, but used carb cleaner on everything, including throttle body.

If I bypass the vacuum solenoid, EGR opens, hold vacuum and car runs rough. Tried changing solenoid, but CEL came back.

As far as I can tell, there is no carbon buildup, eveyrthing flows, the DPFE and solenoid are fine, and the valve opens and holds vacuum.

What could the problem be?

Posted by on

  • 1 more comment 
  • R Jul 22, 2009

    I'm pretty sure it is not the vacuum, as it was strong enough when I bypassed the solenoid.

    I double check all the wiring, and hopefully can avoid the dealer.

  • R Apr 26, 2010

    Replaced sensor again...problem has been fixed for 3 months now.

  • a clogged muffler drain hole will cause both codes get a pick and look for a hole in the front or rear of the muffler and clean it out

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,392 Answers

Sounds like you have a vacuum leak, a problem with the wiring, or a bad PCM. Check wiring for pinched, chafed, pierced, or broken wires. Make sure vacuum supply is good, and not collapsing when the vehicle is running. Beyond that, a trip to the dealer may be in order.

Posted on Jul 22, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

P0174 p0402 p1150 p1151 and p0401


Hi there:



P0401 OBD-II Trouble Code - Insufficient EGR Flow
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.


Symptoms: You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.


A code P0401 most likely means one or more of the following has happened:
The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
There is a blockage in the EGR (tube), most likely carbon buildup
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vaccuum


Possible Solutions: in fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.


Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
Clean out the EGR valve and/or tubing to remove deposits
Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
Replace the DPFE sensor (with a good quality / OEM one)
Replace the EGR valve




P0402 OBD-II Trouble Code - Exhaust Gas Recirculation Flow (EGR) Excessive Detected
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.


Symptoms: You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.


A code P0402 most likely means one or more of the following has happened:
The DPFE (differential pressure) sensor is faulty and needs to be replaced
There is a blockage in the EGR (most likely carbon buildup)
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vaccuum


Possible Solutions: with a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.


Check the voltage at the DPFE sensor both at idle and when the EGR is open
Replace the DPFE sensor

P1150 OBD-II Trouble Code - Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2)


P1151 OBD-II Trouble Code - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
upstream is considered the oxygen sensor for the right side exhaust manifold, before the catalytic convertor. Make sure the sensor's electrical connection is in good condition. On the sensor, test between the terminals with an multimeter/ohmmeter. You should see about 6 ohms at 68*F. If not, replace.

The reason your engine is doing that is because the sensor is failing in such a way that the computer is dumping in extra fuel when it isn't really needed. Then you get the black smoke.





Hope this helps.

Jun 08, 2012 | Cars & Trucks

1 Answer

My Mercury Mountaineer is jerking while in motion. Autozone gave me 3 different readings and I don't know which one to try to get fixed first. The codes were P0401- which deals with the EGR, which I...


the p1400 is also an egr code more than likely the dpfe sensor differencial pressure fuel .....
common trouble with the sensor warranty was extended 2yr - 24k so could be warranty repair

Jun 25, 2011 | 2002 Mercury Mountaineer

1 Answer

Failed emissions got p0301,p0402 please help


V6 or 4cyl????
P0301- #1 cylinder misfire -Old/Fouled Plugs -Faulty spark plug wires/distributor or rotor (4cylinder only) -Faulty cam/crank sensor (v6 only) -Faulty #1 ignition coil or coil electrical connector (V6 only) -#1 Compression loss
P0402- EGR Issue A code P0402 most likely means one or more of the following has happened:
  • The DPFE (differential pressure) sensor is faulty and needs to be replaced
  • There is a blockage in the EGR (most likely carbon buildup)
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vacuum

Jun 07, 2011 | 1996 Toyota Camry

1 Answer

My 2006 escape 3.0 idles rough but seems to run smooth down the road.engine light is on and shows code po402 excessive egr flow. engine starts fine when cold, but cranks for about 10 seconds unless you...


P0402 Exhaust Gas Recirculation Flow Excessive Detected A code P0402 most likely means one or more of the following has happened:
  • The DPFE (differential pressure) sensor is faulty and needs to be replaced
  • There is a blockage in the EGR (most likely carbon buildup)
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vacuum
  • Solutions
  • With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
    • Check the voltage at the DPFE sensor both at idle and when the EGR is open
    • Replace the DPFE sensor

May 04, 2011 | Ford Escape Cars & Trucks

1 Answer

2002 FORD RANGER 6CYL. 4.0L I GOT A P1400 TROUBLE


Exhaust gas recirculation flow insufficient detected.
Maybe you got a bad DPFE sensor, or the pintel inside the egr valve is not opening all the way causing the insufficient flow.

May 14, 2010 | 2002 Ford Ranger Regular Cab

2 Answers

Diagnostic trouble code po401


The p0401 indicates a lack of egr flow. The DPFE sensor (ford basic part number 9J460) is the most common cause of this code. Call a ford dealer for a price and ask if your vehicle is covered under any emissions recall or program for p0401.

Apr 15, 2010 | 2002 Ford Escape

2 Answers

Got code P1402 sum say it is EGR problem, but that code is P0402 I have check all componets and replaced senser,regarlator,and part right next to regalator. also the code was DPFE senser high voltage any...


code 1402 EGR valve position sensor open or shorted, check the wires going to the sensor and the plug itself,hope this helps if not get back to me and we'll go from there

May 15, 2009 | 2001 Ford Escape

1 Answer

2001 Ford Escape error code P0402


Ok here is the solution when I had the exact same problem with my 2001 Ford Escape:
Replace:

Idler air control valve
EGR vaccum sylenoid
EGR valve

I did all of this work myself (and as a girl it was not hard at all), it cost me around $170.00 for all of the parts, had it done in less than 2 hrs., erased the codes and have not had a problem since then! I hope this helps you out, cuz it sure would have helped me out when I encountered the same problem.

Apr 07, 2009 | 2001 Ford Escape

2 Answers

2002 ford focus p0401


Here is a list of possible causes for a PO401, hope this helps.

  • DPFE sensor signal circuit is shorted to ground
  • DPFE sensor VREF circuit is open between sensor and PCM
  • DPFE sensor downstream hose off or plugged
  • DPFE sensor hoses both off, loose or damaged
  • DPFE sensor hoses connected wrong (reversed)
  • EGR orifice tube is damaged or restricted
  • PCM has failed

Feb 10, 2009 | 2000 Ford Focus

Not finding what you are looking for?
2001 Ford Escape Logo

2,270 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

fordexpert

Level 3 Expert

5495 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...