Blubyu12

Well the saga continues..The 8 is back in the shop again. They're chasing the check engine light. Codes show a lean condition. The made sure the airbox was sealed. Replace a dirty air filter (Shouldn't show lean condition) Replace the Air Mass Meter...fault keeps coming back. Next step will probably be the 02 sensor. Warranty covered the Air Mass Meter, but I have to sign off on the diagnostic(possibly 2-3 hours) to continue the hunt. If they find a failed part, then the warranty will cover it. If not...out my pocket. Any ideas on lean condition?

Aarononymous

intake manifold torqued?

PaulW

Could mean a leaking intake manifold gasket (you already have that suggestion below), maybe a bad o-ring on an injector (don't know if that will cause it), or anything on the air intake piping downstream of MAF.

I HIGHLY doubt changing an O2 sensor will do anything.

What is the specific code? I can look it up.

MP4.2+6.0

There are a variety of things from the MAF to the cylinder where the a vaccum leak can be, which then leads right to a lean code if it is at all material--as mentioned, intake gaskets, various vacuum hose take offs and the like, in addition to any outright broken, cracked or deformed parts.

MP4.2+6.0

emissions warranty. If it's a CA emissions level car and your state works like CA, there may be additional coverage there. In CA if the check engine light is on, that's an automatic failure of an emissions test. I'm guessing it's the same in other states too. In CA that then often kicks in the emissions warranty and forces a fix. As I recall, I think you have to jump through the hoop of also actually failing an emission test, not just having the light on that is the "well, duh" precursor. On the other hand, there are some things it doesn't cover--based on what technology was common and what wasn't some time ago.

In any case, it's worth a read. My experience is dealers don't typically talk about this, but know that it's there and have to honor it. Read the warranty applicable to your state so you know what is covered and for how long.

nielso

I had the same problem. They torqued the intake manifold and it seems to have solved it

Blubyu12

Well I talked to service and they are still lost..Supposedly they've been on the line with Audi several times and Audi will be sending out some type of field engineer (super tech)I'll keep you updated on what they find.

blazebarbershop

are you interested in selling your 19 inch wheels?