This is the 2 channel scope I think I would but IF I were so compelled.
HANMATEK Handheld Digital Oscilloscope 50Mhz Bandwidth with 2 Channels HO52 3.5"TFT Mini Oscilloscope, 2 in 1 Oscilloscope and Multimeter, Backlit Screen, Auto-Calibration Function, Memory Function https://www.amazon.com/dp/B08VRDG94N/?tag=wranglerorg-20
Hello TJ addicts
Just to say that I haven’t been able to identify the issue after many months so I have asked a Jeep specialist to fix.
It was the PCM which was sending bad codes randomnly, and they have ordered a new one from your nice country. With a few delay, it has been delivered and the Jeep is running well again
It was hard to determinate the origin of the issue and I want to thank all members who helped me to diagnose. This helped to save a lot of money instead to let the Jeep specialist do it (about 100 dollars an hour here).
Thanks!