Check engine light question..
Thread Starter
AudiWorld Member
Joined: Jun 2007
Posts: 167
Likes: 0
Check engine light question..
I've had the CEL come on twice in the last month and then go out a couple of days later. Dealer could not find any issues last time except a few engine misfire codes. Anyone know what causes the CEL to turn off ? Is it a time interval or the number of engine starts ?
AudiWorld Super User
Joined: Oct 2005
Posts: 3,489
Likes: 66
Re: Check engine light question..
FWIW: I had similar problem for about a month - the CEL woiuld come on, then just go out after a few days or after numerous engine off/on's the same day. The dealer diagnosed as something like "defective low pressure fuel sensor" (is there such a thing?). They replaced it about three weeks ago and the CEL has not come back on.
Audiworld Junior Member
Joined: Mar 2007
Posts: 68
Likes: 0
From: Philadelphia, PA
Re: Though some of the faults should be stored in the history
This has happened for the first time with my 07 B7 3.2.. Dealer could not find any codes stored. The CEL came on and went out a few days later again. Bringing the car in again tomorrow.
Any ideas?
Any ideas?
Thread Starter
AudiWorld Member
Joined: Jun 2007
Posts: 167
Likes: 0
Well, this happened to me about 6 or 7 times....
Eventually they said there was a lot of carbon build up and wanted to do some type of fuel/intake treatment at $200. This does seem to have solved the issue but I still have some cold start issues that need addressing. I think the cause is either low pressure fuel pump or injector clogging. Let us know what they tell you.
Audiworld Junior Member
Joined: Mar 2007
Posts: 68
Likes: 0
From: Philadelphia, PA
Re: Though some of the faults should be stored in the history
Brought the car in this morning. CEL still on. Some rough idling initially upon start up, then normal idle. Awaiting a call from them hopefully with a cause and solution. At least I got an A6 instead of a beat up A3 for a loaner this time.
Trending Topics
AudiWorld Stories
Bringing Audi to Life for Audi Fans
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer
Brett Foote
10 Audi Features & Options We Miss the Most!
Joe Kucinski
Audi Recreates Crazy-Looking Speed Record Breaker From 1935
Verdad Gallardo
Coachbuilder Recreates the 1995 Audi TTS Concept
Verdad Gallardo
Every Audi V10 Car Ranked!
Joe Kucinski
9 Audi Designs That Aged Like Fine Wine
Verdad Gallardo
2026 Audi Q5 Buyer's Guide (Every Model Explained)
Brett Foote
Ranking Every Current Audi 'S' Model From Worst to First!
Joe Kucinski
10 Best Audis That are FINALLY LEGAL to Import to the U.S.!
Joe Kucinski
AudiWorld Super User
Joined: Mar 2000
Posts: 13,967
Likes: 0
From what the master tech told me...
... if you're getting CELs and they can't resolve it they do the last thing which is taking things apart and cleaning it. If you're under warranty it should be covered.
I'd be interested in seeing if it's carbon buildup or oil deposits on the intake valve.
I'd be interested in seeing if it's carbon buildup or oil deposits on the intake valve.