Is there an inexpensive way to get TPMS tire transmitter hex codes without paying a tire shop to do so? Any inexpensive readers that work well on Amazon or wherever? Last year I attempted to get the hex codes with a USB SDR (software defined radio) setup that supposedly could do so but that was a failed experiment. Yesterday I changed all 4 tires at home using the old Harbor Freight tire machine and balancer, and while the tires were off the rims I wrote numbers 1-4 and took pictures of all the TPMS transmitters so I could check things out later with Techstream. I know I can drop tire pressure 1 tire at a time and watch it the computer. BUT, I also found out that the Amazon replacement TPMS transmitters I purchased had ALL THE SAME hex codes/serial numbers! Lol! So I took the car to my local tire shop and they were able to use a handheld TPMS receiver device on each tire and ID them, which I wrote down and did the Techstream thing to activate them. Now I have at least one bad TPMS transmitter for the last few months. I have one spare transmitter left of those 4 I got from Amazon. I hate bothering the tire shops to do this, as I like doing ALL my own work on my cars, and I know they don't like people coming in to have things done for free.
So you bought a set of transmitters from Amazon, and they actually transmit different ID codes, but they all have the same ID code printed on them? Do any of the actual ID codes match the one that's printed?
