Audi A5 Forum & Audi S5 Forum banner
1 - 20 of 28 Posts

·
Registered
Joined
·
61 Posts
Discussion Starter · #1 ·
Cold today, really frosty. I let the car warm up on the drive, then drove off. The orange Emission control system light came and stayed on. I didn't notice any unusual behaviour, other than the light, but I pulled over and consulted my manual. It seems this usually happens when driving only short journeys, when the emissions system doesn't get hot enough to burn off all the soot n' stuff. However, I've been doing about 500 miles a week in my A5, so I doubt this was the problem.

The only thing I can think of:
1. The cold weather is the cause
2. This is my first tank of BP "ultimate" diesel - perhaps this a factor?
3. Something has failed on my exhaust system.

I rang my local Audi garage, who said it's probably no biggie. I've booked the car in for a week's time. I'll let you know what they find, in case this affects other A5 owners in the cold weather ahead....
 

·
Registered
Joined
·
39 Posts
I had the yellow warning light flashing this morning when I started the car, not a particularly cold morning although the car had not moved since friday, very lumpy on start up but settled down after 30 seconds and the light stopped flashing.

Have you had any more feedback from Audi as to the possible casue?
 

·
Registered
Joined
·
479 Posts

·
Registered
Joined
·
39 Posts
Mine is an S5 and I have had the niggling feeling that the car isnt quite right for a few weeks, at lower speeds it seems a little lumpy especially when accelerating in a higher gear, I have put it down to just being in to high a gear - e.g. 30 mph in 6th, seems ok when the speed increases. i have been cheaking the oil as i thought this might be the problem but the oil has not moved for the last 5 months, this and the fact that my economy is decreasing makes me think I have the start of a problem.

I have not contacted Audi as I dont have a tangible problem yet, will certainly call if it flashes again.
 

·
Registered
Joined
·
61 Posts
Discussion Starter · #5 ·
No answer yet..

So, Audi Aylesbury is coming to pick up my A5 on Tuesday. I'll let you know what they say.

Meanwhile, I left the car in the driveway for a couple of days (during which the weather warmed), then hey presto! No more warning light.
 

·
Registered
Joined
·
36 Posts
Mine came on the other week. I was in a drive thru car wash!! (shock horror but mine's white and shows the dirt soooo much this time of year). Anyway I'd switched the ignition off and was listening to music. When I tried to re-start the engine, the rev counter and speedo needles shot round to 3 oclock as normal but the engine didn't turn and the light came on! Tried a couple of times with no joy and started to sweat a little due to the queue that had formed behind me. Only after completely removing the key from the dash and trying to start up again sorted the problem. Hasn't happened since. Anyone else????
 

·
Registered
Joined
·
171 Posts
Funnily enough, mine came on this week, on my way home from Manchester.

My car was already booked into Newbury Audi for them to investigate the vibration issue, so they just got another thing to look at!

I noticed on the service form that they were also undertaking three service items / recalls - something to do with battery management, one to do with a fuel line and something else I can't now remember.
 

·
Registered
Joined
·
479 Posts
Mine went in on wednesday. It is the secondary water pump. It has an intermittent fault and needs to be replaced. Part is on back order and will be delivered in a fortnight. Car is fine to dsrive till then they tell me.
 

·
Registered
Joined
·
61 Posts
Discussion Starter · #9 · (Edited)
No fault found

Audi Aylesbury report on my car:

"Engine management light on, no running faults. Carried out guided fault finding, tested air mass meter and air temp sender. Cancelled faults and rad tested. No parts used."

Seems as though they couldn't find anything wrong. No mention of secondary water pumps, etc.

Incidentally, they also carried out the following two recalls:

Recall 20P2 renewing fuel hose. Parts fitted: rep. set, washer
Recall 27C5 reparing earth wire. No parts used
 

·
Registered
Joined
·
61 Posts
Discussion Starter · #10 ·
here we go again

Frosty again today, and guess what? Yup, emissions warning light staring at me from the dash - a steady gaze that tells me audi aylesbury will be taking the car back in very shortly.

I will tell them to check the secondary water pump thingie.
 

·
Registered
Joined
·
171 Posts
According to my dealer, my emissions light coming on was caused by the airbox becoming full of leaves... Not entirely clear how that happened, but hey, at least it wasn't anything too serious.
 

·
Registered
Joined
·
2 Posts
Warning lights

In recent weeks the emission control warning light in my S5 has come on and remained on twice, with no fault being identified by the dealership when I took it in. Most recently I had the parking break and ESP warning lights come on, and remain on.

Docklands Audi checked it out for me and again said there was nothing wrong with the car that they could see, although from the readouts they had they did say although this time it was a different set of warning lights, it was being triggered by the same issue as for the previous warning lights. They were stumped and passed the details on the Audi Technical, and were told of a known problem to do with air getting into the emissions system, and they did need to install a new part to sort it out. This has now happened - my fourth trip to Docklands Audi in about a month. I am off on a long drive this weekend and will see if any more warning lights come on.

At no point has there been anything wrong with the car that I noticed, other than the warning lights coming on.
 

·
Registered
Joined
·
61 Posts
Discussion Starter · #13 ·
Fixed?

Well, whilst waiting for Audi Aylesbury to pick up my A5 again, the light went off again. It really seemed to only come on when there was frost.
Anyway, the dealership kept it in for a couple of days, and replaced the "air temperature sensor". This seems to have fixed it, but then again there hasn't been any frost since I got the car back.

BTW, Aylesbury Audi have been consistently helpful, and they provide a free tin of Audi-branded sweeties when they return the car. Small touch, but appreciated.
 

·
Registered
Joined
·
17 Posts
Hey fellas,

Ah! Took delivery of my A5 just TWO days ago, and now i got this annoying yellow emissions control light on my dashboard and I'm less than impressed.

I'm all the way in Sydney and the past two days have been scorchers - 30 degrees celsius..so i don't think i'm having the same 'frosty' problem as you guys :confused:

Anyone know if the manual advice works? (i.e. drive it at like 60km/hr at 2000rpm for 15mins to burn off the soot)

Gonna give my dealer a call tmrw and see what he has to say about it!
 

·
Premium Member
Joined
·
1,800 Posts
Anyone know if the manual advice works? (i.e. drive it at like 60km/hr at 2000rpm for 15mins to burn off the soot)
Yes, it works. It's normal for diesels to get a build up in the particulate filter if you only do short, slow journeys. You shouldn't really buy a diesel if that's what you normally do.

I also had the warning on the dash when I'd been driving the car less over a few days. Then the morning after on my way to edinburgh the warning went away, as the soot had burnt off.

If the warning doesn't go away, audi will certainly clean the filter for you if it's too clogged up to clean itself.
 

·
Registered
Joined
·
3 Posts
Emission control warning light came on for me as well. I tried first the normal procedure to clean the clogged DPF, but that didn't help. Next morning I went to local dealers express service. After diagnostics it turned out to be faulty intake air temperature sensor.

I think it has been at least partly broken for longer while. The symptoms before warning light were:
- slightly different engine sound (more old fashion diesel)
- ~0.5l/100km more consumption on extra urban roads
- sluggish throttle response on low revs (1200-1500rpm). This I found out only after repair - engine much more lively.

Last but not the least I have to mention that service was pretty excellent on Audi Center Helsinki express service - I even got small breakfast while waiting for diagnostics. This customer care experience made me feeling MUCH better after annoying warning lights ;)
 

·
Registered
Joined
·
479 Posts
Bugger. Engine management light came on again yesterday. Really haven't got the time to get it to Audi this week :thumbsdown:
 

·
Registered
Joined
·
2 Posts
Aaaaaaahhhhhh

I've had an on-going problem with mine for 3 months now. Today was the 4th time I have taken my car into Bristol Audi in 6 weeks.....

I usually only drive 4 or 5 miles to work 3 days a week and a long trip once or twice a week. The Particulate Filter light comes on usually once on every trip, even after the long trips. First time Audi said they had reset the light, second time they "said" they had replaced it, 3rd time they said it was a software update...... So I'll keep you updated as to what they come back with this time!!

When I dropped it off this morning the DPF light was on, the glow plug was flashing and the engine management light was on.... Me thinks my car has got swine flu!! :music-smiley-019:
 

·
Registered
Joined
·
479 Posts
Had mine sorted and they said it was a software update....
 

·
Registered
Joined
·
26 Posts
Had the yellow outline management lamp come on (Stays on) at 6K miles on June 09 model. Have been told it needs a new, modified auxilliary coolant pump. Goes in next week but ok to drive as normal until then!!
 
1 - 20 of 28 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top