Question about 2002 Honda Accord

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Po401 lost of power honda accord 4cly 2002 ex after replacing EGR valve.

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Most likely a bad dpfe sensor

Posted on Oct 07, 2009

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Why does it feel as though it's going to die as I am at idle in park and/or while in gear sometimes?


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Sep 29, 2015 | Honda Accord 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

P0401 EGR code In Ford explorer 2002


PO401--- EGR Flow Insufficient Detected

If all you have is an egr valve replace it

If you have other hoses & sensors coming & going from it,
leave it to a repair shop

Sep 21, 2011 | 2002 Ford Explorer

2 Answers

1992 Honda Accord Ex stick shift. has been either not starting or cutting off after it starts. If I wait about 10 mins., it will start again. I have replaced the starter the heat sensor unit and new...


Check your main relay. It powers the fuel pump and the ignition system. They are a known problem, with a high failure rate, on the 90-93 accords. I do believe it's worth checking.

Nov 04, 2010 | 1992 Honda Accord

1 Answer

Where is the EGR valve location on a honda accord ex 1999.


Here is a picture of where the EGR Valve is located. Replacing it is fairly simple and straightforward. A vacuum line and a couple of bolts. You'll see what you have to do when you look at it.

If you are replacing the EGR Valve due to the Check Engine Light (MIL) being on with a DTC P0401 then I suggest contacting your Honda Dealer. There was a Product Update Campaign (PUD) in the fall of 1999 that corrected the problem.

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Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Sep 21, 2010 | Honda Accord Cars & Trucks

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Dpfe not working po401


Technical Description

Insufficient EGR Flow
What does that mean?

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.
Causes

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

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Sep 07, 2010 | 2002 Honda Accord

2 Answers

How to repair p0401 code for honda accord 98


The code is for a restricted EGR valve. You will need to take the valve off the manifold and clean out the ports.

Mar 26, 2010 | 1998 Honda Accord

1 Answer

I have a ford explorer sport 2002 and my chek engine light came on it put out a code PO401 do you know what i need to buy


PO401 code means that:
The PCM has determined that there is insufficient flow in the exhaust gas recirculation system. Definition: EGR system fault (Exhaust Gas Recirculation) Probable Causes: a. Blocked passage on EGR system b. Failed EGR Valve c. EGR solenoid faulty d. Failed EGR pressure sensor where applicable e. Failed EGR position sensor where applicable

Mar 08, 2010 | 2002 Ford Explorer

1 Answer

2002 ex v6 engine light on code told me it and egr valve. where is it and do I have to do any else beside just replacing it.


you might just have a piece of carbon holding the pintle up.
or the egr valve might not be opening.round can on the intake manifold with a vacume line going to it.

Jan 02, 2010 | 1994 Honda Accord

1 Answer

ERG valve located on a 2002 Honda Accord ex 3.0 vtec


Right beloww throttle body toward front of car

Jun 18, 2009 | 2002 Honda Accord

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