Originally Posted by
pwdrskr
However, that scenario, disconnect piggy back, quick scan shows no issues and therefore no TD1. The problem will come if something happens to the car that causes the techs to dig into the logs. At which point, the increased boost numbers reveal themselves and Audi then TD1s the car refusing to fix the problem. I suppose one could claim the car was unmodified, but Audi would have the data.
So, it would seem that anything that modifies engine performance will eventually be revealed, and revealed when an engine problem related to performance occurs. There is no perfect way to avoid the TD1 designation and having repairs denied. At least that is how I understand these things.
Yep, I've explained this a few times across the forums over the years on this site, that nothing is a guarantee after you make any modification to the vehicle, and Audi can choose to deny a warranty claim for both hardware and software modifications. In this case I was specifically speaking towards standard maintenance visits.
Flashing your ECU & TCU back to stock, or completely removing a piggyback, and putting at least 3 start/stop cycles and about a dozen miles is enough to reset the short term environmental data (including previously requested fuel trims, boost, etc) that exists in the ECU for a service visit. Again, it's not a guarantee, but it's generally enough to avoid any *automatic* TD1 flagging at a standard service visit. I've never had an issue or been flagged across any of my Audis since 2013.
That said, and reiterating what I've also said before in other posts, any catastrophic failure requires an engineering review before a warranty claim, and the SENT bus modules each have their own logging capabilities that when thoroughly reviewed, will nearly always show you've modified the car, even if it's presently back to stock, and they'll flag the car and deny the claim. If you aren't prepared to pay out of pocket for something like that, then it's best to just not modify the vehicle.
APR Plus is a good idea in theory, but they keep raising the price and lock you into the lowest output tune (sometimes even de-tuned from their standard 91 tune depending on the platform) and what I keep seeing people do is spending that extra money...and then voiding it right away by flashing to a higher octane map after they want more power or, immediately adding hardware mods that void it all the same. If you're content with the 91 tune and nothing else, it's a decent option. I know I would buy it...and immediately want to try the 93 file, annnnnd then it's useless.
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gotta try that
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