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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » Clearing ECU fault code / turning off ECU light » Post Reply

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amyspud

posted on 12th Jul 07 at 19:36

but surely if the EGR was faulty the car would be playing up in some form or other - the car runs sweet, starting, accn, etc etc. Passed the MOT with flying colours including emmisions...


Warren G

posted on 12th Jul 07 at 19:30

faulty EGR or possible wiring fault


amyspud

posted on 12th Jul 07 at 19:15

When they clear the code the light goes out for 30 secs (or so) then code comes back and then light comes back on.

I changed the EGR for a 'guaranteed' second hand EGR.

Reports back :"P1405 EGR Valve Feedback Incorrect"


Warren G

posted on 12th Jul 07 at 18:11

have they cleared the code? is it still on?

faulty EGR?


amyspud

posted on 12th Jul 07 at 16:40

So - I've changed the EGR with an EGR that was 2nd hand but guaranteed to be working BUT ECU light is still on. Paid for the Tech 2 to be plugged in again to see if the fault had to be cleared through this (having been unable to clear it through >30 cold starts and having disconnected the battery several times and for several days) and..... the Tech 2 now reports "P1405 EGR Valve Feedback Incorrect".

The car passed the MOT with flying colours, drives beautifully, starts fiirst time, cruises, accelerates, idols perfectly, great fuel consumption but the ECU light is STILL on - any new ideas please?


amyspud

posted on 7th Jul 07 at 12:30

Any new ideas chaps?


amyspud

posted on 2nd Jul 07 at 22:54

Start / stop 35 times and the ECU light is still on - help....


amyspud

posted on 1st Jul 07 at 18:38

Up to 26 tonight (starting the car from cold) and still the light is on :boggle:


amyspud

posted on 30th Jun 07 at 19:44

That 30 on/off - is that just turning the ignition on and off rather than starting the car 30 times?


Vaux Lad

posted on 30th Jun 07 at 18:14

quote:
Originally posted by warren.g
not always 100% ture, sometimes you need to clear the code before the EML goes out

But on later systems you cant clear the code by disconnecting the battery. :thumbs:
Some say 30 ignition on and off's do it, but it doesn't on mine.

Apparently a set number of cold starts are needed without the fault occuring before the ecu clears it.


amyspud

posted on 30th Jun 07 at 17:29

Can yo uclear it by disconnecting the battery for a period of time? OR do you need a diagnostic reader?


Warren G

posted on 30th Jun 07 at 16:34

not always 100% ture, sometimes you need to clear the code before the EML goes out


Vaux Lad

posted on 30th Jun 07 at 16:22

The light goes straight off.

And the fault will clear eventually.


amyspud

posted on 30th Jun 07 at 16:07


Also see my post earlier today :)


Once it's on and the ECU logs a fault - if you then change the faulty part does the light go off automatically or do you need to plug in a diagnostic tester and clear the code and swith light off? Can this be done by just disconnecting the battery?