1stTimeSub

I just talked to the dealer and they wanted to do a more thorough investigation, which I don't fault them for at all. But, he went on to say you should only do a TCM re-learn once in the lifetime of a car. Can anyone comment on this? Would more than 1 re-learn hurt your car? I'm not so sure I believe that.

Does a relearn cost anything at the dealer? Is it any different than what is described in an ECU relearn in the link below? https://legacygt.com/forums/showthread.php/relearn-idle-after-battery-disconnect-257323.html

Did you ever get this resolved? I had this same issue awhile ago also and took it into the dealer, they said it needed a new serpentine belt and per my request I had a drain and fill on the CVT at the same time, I noticed the problem was greatly reduced. That was about a year ago @ around 85,000 miles. I cannot confirm if they truly did a drain and fill - the dealership by me is hit or miss - but I think they did. A little more info... I had the battery replaced because I was told by the dealer it was time to look into replacing the batter. So, I shopped around and got a battery that was well priced, changed the batteries out, and then... as I was driving to return the old batter, I had this irratic engine behavior going on with the A/C on. I got a check engine light after coming to a full stop at stop light. I can't remember the code, but it had to do with something electrical. That's what prompted me to take the car to the dealer. In my mind I thought the CVT was the culprit (which is why I requested the drain and fill on the CVT), but the dealer checked it out and said it was the serpentine belt. That makes sense to me since there was a new battery (new component to the electrical system), the belt drives the alternator (recharges the battery and critical to the electrical systems), and the compressor (which is why the a/c being on amplifies the issue). I am noticing this issue coming back now. My car is just over 95,000 miles. I inspected the belt and it looks perfectly fine to me. I need to take the car in for the airbag recall and I am thinking about asking for a drain and fill on the CVT again. I do a lot of city driving so it wouldn't hurt anyways, but I'd love to know the root cause of this issue. Given my previous experience, I can't say it is the CVT, but I have read all around the internet that a drain and fill on the CVT is never a bad idea. If the problem is still there, I'll try changing the serpentine belt myself since it is pretty easy to do. Other thoughts I have had is: - any of the pulleys attached to the belt could be going bad, including the compressor pulley - Tensioner could be bad too.