Originally Posted by lobuxracer
Techstream is the same for all Lexus, Toyota, and Scion vehicles. I have the full legal version and subscription the same as any dealership tech. I don't know why a Toyota tech would shy away from it, all the necessary tools are there. But, whatever, yes, I would also pursue this as a warranty issue. It might just be a bad connection to U33.
Not the Techstream TPMS thing. The software in the car (ECU I guess). He is certain the TPMS programming is correct as it would either work or not work. But wouldn't work sometimes and not others.
Edit: At the time I was kind of thinking they were full of it. But I'm not going to argue with them about doing a diagnostic that they are going to charge me for as they don't do Lexus warranty work being a Toyota dealership. Also, if they aren't comfortable doing something to my car then I am not comfortable making them to do it.
I'll just take it to Lexus as I firmly believe this is a warranty issue. So far it's my only one. The TPMS problem is getting worse too. It started out happening about once out of every 4-5 engine starts. Now the tire pressure fails to show on the dash about 4 out of every 5 engine starts. (all 4 pressures, not 1 or 2. It's always all or none)
I could live without the readout, but my bigger concern is what is going to happen if the receiver fails completely? Will I even be able to start the car? I have had a message about the smart key not being in the car when I've tried to start it once or twice (but not recently).