I just bought a used 02 TT today. Ran great all day then I went to start it in the evening and all it did is start then immediately stops. The engine does run for 3-5 secs. I went and bought a new battery, no resolve. The keys are the original keys so I don't believe its related to the electronic immobilizer. BTW, the only thing done to the car before the issue is detail it.
Any thoughts? I'm extremely frustrated and plan on calling the seller tomorrow and ripping him a new one.
That's the whole point of the immobilizer, to keep the car from running if the correct keys aren't used. There's a renegotiation sequence you'll need to do to retrain the car/keys when you put new batteries in. Don't remember it off the top of my head but you should be able to search for it here.
Aviator Grey/Ebony Cloth
i had this happen with my 2002 with about 50k on it and the dealer could not figure it out for like 3 weeks. which was ok since i got a new a4 loaner. they replaced all kinds of stuff trying to fix it (cluster and so on) they ended up ordering me three brand new keys(2 with remote and one plastic). car started fine since then...
2002 TT 225 quaTTro coupe black/black 100k club
Had the same problem with my 2001 (A4) Jetta TDI. I researched that it could be the anti shudder valve (which blocks off air to the engine to stop violent shaking when the engine is commanded to stop) or it was the immobilization system. The immo icon showed on the dash indicating that it was not a legit key in the ignition switch. I was able to drive home after disconnecting the battery cable from the battery and shorting out the pos and neg cables for 20 seconds. Hopefully this reset whatever was unset in the car's computer. Every couple of weeks my engine would crank and then die after one second, then after several tries it would run normally. This problem may return for me, if so, I do not know what the solution is. A new ECU? Hope this helps.
i had a similar problem a few months back... check your engine speed sensor and crank sensor.
The same happened to me - after having it refuse to start for me on several occasions, it died on me at a red light (how embarrassing). It turned out that there was a problem with the crank sensor producing an incorrect reading. You should probably get it looked at soon.
I was having the same problem with my 2001 1.8, and wound up chasing a vaccuum leak (oil dipstick tube was cracked, and replaced the 'air flow sensor?') Since the new parts went in there hasn't been a failure to start, AND I seem to have corrected another (unknown to me) problem that gave me back what seems to be about 30-40% of the power I didn't know that I have been driving without! Apparently the air flow controller also has "yes/no" control over the turbo kicking in.
Not being a mechanic, I hope this helps.....
i have a problem that sounds alomst the same but ithink its something elnce my one tt quattro if it has less then a 1/4 tank some times it will start then die rite away it only does it when it is low on gas and it does it with both keys. we where haveing other problems like 4 months ago and i replace fuel filter and fuel regulator and the audi shop replaced mass air flow and coolent temp sensor then those problems went a way. keeping the car full on gas for know tell i can get more ideals to see if im on the rite track.
Still sounds like an immobilizer issue. Have you tried other keys? One can fail without affecting others. You have to take all the keys to the dealer with the car in order to re sync them. There is a yellow key icon in the dash cluster that illuminates if the immobilizer is active. As to other possibilities there is an engine speed sensor on the front of the block that can cause intermittant start no start issues. It would be rare for it to give a -start run 5 seconds shut down consistently -- effect though. I suspect an immobilizer issue. either a failed key, or a bad cluster if multiple keys are affected.
2001 TT 225 QC
2006 A6 3.2 Prestige
2011 Q7 TDI Prestige
2010 Cayman S