Go Back   SEAT - SEAT Forum » Diagnostics, Tuning and Modification » VAG-COM & Diagnostics

VAG-COM & Diagnostics VAG-COM is a diagnostics program that allows your PC to talk to your ECU - All VAG-COM / 1551 questions to be posted here

Thread Tools Rate Thread Display Modes
Old 01-02-2008, 08:32   #1
Posts: n/a
seat Ibiza - diagnostic problem

Hi Help please!

Seat Ibiza 1.4 petrol 2004, 108k miles

engine type: BBY

serviced 2 months ago at seat dealer- engine light appeared - mechanic mentioned something about the engine taking in too much air 9.1 instead of 5.1
he said he fixed the problem twice he didnt - it appeared on screen half an hour after leaving showroom three times on same day!

took to another mechanic he said the EGR valve was loosely connected he reconnected it and the fault disappeared - fault cleared but 20 minutes later it reappeared.

took back yesterday to get hte fault codes (there are now 2 faults there was only one before)

16786 P0402 Excessive flow detected
16555 (new fault) fuel trim bank 1 too lean

he has suggested that he will remove and clean out the EGR valve and reset adaptions but if this doesnt work what shouldl be done?

does anyone know ...please help the car is due a mot tomorrow! i'm afraid of it failing because of this engine light problem

the car is running fine - i cant notice a problem with it

  Reply With Quote
Old 19-05-2008, 23:27   #2
robreidmotors's Avatar
Join Date: May 2008
Location: Lancashire
Posts: 694
robreidmotors has 10 points
Hi mate

Found this on the net, i have no idea where or what the dpfe sensor is...a quick and cheap attempt would be to detach the air inlet from the throttle body, spray copious amounts of throttle body cleaner in whilst revving at about 3k and see what happens, this will give it a good clean, and hopefully youll see lots of black crap come out of the exhaust. Doing this might help clean the EGR (see below). its only £5 for a can.

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 (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.


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
robreidmotors is offline   Reply With Quote
Old 23-06-2014, 22:51   #3
Join Date: Jun 2014
Posts: 4
Al_Cordoba_King has 10 points

Sorry for digging up an old thread but did you ever correct the CEL?
I've the same problem with my Seat Cordoba 1.4l 2006, had a look at the ecg, seems to be clean as a whistle..
Al_Cordoba_King is offline   Reply With Quote


« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

(View-All Members who have read this thread : 70
2minits, @lq!, Al_Cordoba_King, Andrew-C, Avim28, benuk, Bikerz, bizkit, bjburns903, Black TDI Turbo, blue-beautii, bluenose, Colin C, cordoba175, cresswell22, CupraSean, dan151, daz_cymru, deebow, dontbother1979, doug89, dunjamon, Emibuddedge, Fahid82, foto2021, gac, gavyn g, ibiza@kev, IbizaCupra1987, jacko_86, JamesT, Jay1990, joshpmc, JPS3290, karacayasin, killer205, leighivn, lil3520, M1KEH, mazzerati, mc funbot, MichalR, MJ, Neil1, petbass3, Phil Gee, Phuture, pinsnpies, processpaul, Red ibiza, rf860, Roohul, RUM4MO, Scotsmin71, ScottHmk4, scumspawn, SeanyK, Seth110, shep0706, sheperd, Sikhmans, thegooner, thomasa, TJP, towcester vag, Wilkeh, xxjay247xx, Yeti Bo Bo, zomby, __B3NNY__
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Whats the biggest wheels i can put on a seat ibiza dragonsnake1985 Ibiza Mk2 60 21-04-2008 18:03

All times are GMT +1. The time now is 00:04.

Website © 2014

Disclaimer: is not an official SEAT site and is not affiliated to SEAT in any way. Visit the Official SEAT Website. are not directly responsible for information which maybe posted in this forum.
All content is viewed and used at your own risk. We do not warrant the accuracy or reliability of any of the information.
The views expressed herein are those of the individual contributors and not necessarily those of or SEAT
All trademarks and copyrights remain property of their respective owners.