Question about 2002 Ford Windstar Cargo

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2002 ford windstar 3.8 liter code PO402

Has anyone had this code PO402 (excess flow egr ) come up and had luck by replacing a part or did you have to go through this process of elimination of replacing everything in the Emissions system just to find it...dont have alot of cash" is it usually the EGR valve itself bad??????????its on a 2002 windstar w. a 3.8

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I know this is a old post, but I had the same problem and it was the dpfe sensor. The EGR is almost never the problem with this code

Posted on Jan 01, 2009

Testimonial: "sorry it took so long for the response to this" i had thought i had left one".it was the DPFE sensor. thanks again""

I changed the egr valve and cleared codes it came back on i was talking to someone and they told me to change the dpfe sensor

Posted on Sep 04, 2008

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Code PO402 IN 2006 FORD VAN


EGR excessive flow. The fix for this should be cleaning the throttle body with a throttle body cleanser. If carbon is excessive, you may need to remove the throttle body and clean the 2 ports out with a pick or small screwdriver and the cleaner.

Oct 22, 2013 | Cars & Trucks

1 Answer

I have the code PO401 AND PO402 codes on my 2002 focus, any suggestions?


PO401: EGR insufficient flow detected
PO402: EGR excessive flow 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 vaccuum

Feb 25, 2012 | 2002 Ford Focus

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

Need to find out were the dpfe sensor is on my 1999 toyota camery with a v6 it has a code po402 and they say to check this sensor first


p0402 is egr valve flow excessive. egr valve needs cleaned or replaced also check wires etc. to vavle.

Apr 22, 2011 | 1999 Toyota Camry

2 Answers

I gotta 1997 toyota avalon its running rough i ran a scanner it threw two codes po441 an po402. i need help figuring out wat these codes are


Hi there osborne_shay,

Those codes refer to a problem with the drive train in your Avalon. Here is what the codes mean.


PO441-Evaporated Emission Control System / Incorrect Purge Flow
PO402-Excessive gas flow through the EGR valve

The cause for these issues are either that the components are faulty or they just need to be cleaned.

Mar 31, 2011 | Toyota Avalon Cars & Trucks

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

Fault code 402 have changed egr valve exh pressure sensor & egr solenoid nothing helps


po402--egr flow excessive, maybe carbon has built up in egr opening in engine!! or curcuit to egr valve is bad.

Aug 27, 2009 | 2002 Ford F150 Regular Cab

1 Answer

Obd2 codes


po402 is egr flow excessive, remove and clean carbon out of valve. or replace it.

Jan 28, 2009 | 2002 Nissan Frontier Crew Cab

2 Answers

1995 Ford Windstar LX 3.5L Error Codes?


  1. P0171-bank 1 lean, usually oxygen sensor
  2. P0174-bank 2 lean, usually oxygen sensor
  3. PO402-EGR ins. flow, Clean EGR exhaust tubes and replace sensor should fix this problem

Dec 31, 2008 | 1995 Ford Windstar

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