Emission control system light

Post by **scottie1979** » Sat Dec 26, 2009 10:07 pm

you know what, mine went out a few days ago too! Hasn't come back on yet. at least the dealer saw it when it was on and recorded the faults to order parts.

Post by **PetrolDave** » Sun Dec 27, 2009 11:39 am

davidkoulakis wrote:all bloody lights out now (inc EML) and run the car today, max revs and no return of the light !

Check what fault codes have been logged on the two engine ECUs (addresses 1 and 11) using VCDS (VAG-COM).

Post by **HYFR** » Sun Dec 27, 2009 3:43 pm

dave, by virtue of the eml light coming on does that mean a different or more serious fault has been identified vs. Just the epc light

I had the audi man out for an hour and he was very thorough and did a number of tests and gave it the ok

Its just the dealer iv got it booked into a 120miles from me and im going away to the US so its going tp be lots of hassle to give it to them on Tues only for them to do the same tests as the audi man and decide its ok, esp given the lights are out and have stayed out despite some spririted driving today!

Post by **PetrolDave** » Sun Dec 27, 2009 5:41 pm

davidkoulakis wrote:dave, by virtue of the eml light coming on does that mean a different or more serious fault has been identified vs. Just the epc light

What do you mean by EPC and EML lights?

Post by **HYFR** » Sun Dec 27, 2009 8:24 pm

PetrolDave wrote:
davidkoulakis wrote:dave, by virtue of the eml light coming on does that mean a different or more serious fault has been identified vs. Just the epc light
What do you mean by EPC and EML lights?

they are two seperate lights on the dash

just the EPC light was on first, on and off

then it came back on accompanied by the enigne management light (EML)

then they both went off !

Post by **HYFR** » Mon Dec 28, 2009 1:37 am

epc back on !

Post by **HYFR** » Mon Dec 28, 2009 4:25 pm

guess what, its gone back off!

this is going to go on forever, a thread where I just talk to myself

seems to go off when its a bit warmer, i.e. more than 2degrees, which is consistent with the Audi man's diagnosis that its the extreme cold thats causing the light

Car has not changed in its characteristics since I picked it up throughout the light show

Post by **sonny** » Mon Dec 28, 2009 5:03 pm

I feel for you, it would be absolutely peeing me off. could one of your cats be broke?

Post by **PetrolDave** » Mon Dec 28, 2009 7:13 pm

Might help if you posted what fault codes the engine ECUs (addresses 1 and 11) are showing - without that anything we say is 100% guessing...there are literally hundreds of reasons why the fault lights will appear on the dash. Some are minor or intermittent - which is why the lights come and go.

Post by **HYFR** » Mon Dec 28, 2009 7:16 pm

Dave - agreed, though I dont have VAG COM; though im assuming its the same fault as per the Audi Assist diagnosed and tested

i will book it into my local dealer in the new year

just very annoying

Post by **scottie1979** » Mon Dec 28, 2009 9:45 pm

well mine is in on the 11th for two days so i will let you know the outcome esp. as the light has now gone out

Post by **Porky** » Mon Jan 04, 2010 5:59 pm

Yep, mine are on and off a lot at the moment... any combination of EPC, ESP & ABS!

Fed up with Audi just clearing the faults. the car seems fine and they generally go out after a few minutes.

I think the brain is too clever...

Post by **HYFR** » Wed Jan 06, 2010 6:15 pm

it was off, but coinciding with the snow again, its back on !

just thought id mention it

Post by **sonny** » Wed Jan 06, 2010 7:17 pm

Your car has the flu due to cold weather? lol

Post by **PJI** » Wed Jan 06, 2010 9:28 pm

My EML has been coming on and off. The car was serviced today and they diagnosed that it was caused by a rich fuel mixture but there is not a fix for it yet! FFS the cars 2 years old how can they not have a fix yet? On top of that it's had new front discs and pads. Ouch......

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