I Have a ram 1500 2019 5.7 whenever you try and start it up nothing happens but the dash lighting up and it turning on the security control module light.
The dealership has replaced the security control module , ecm , pcm , i have a new fob , and have upgraded my battery to the highest voltage one my vehicle was recommended, everytime its worked on its got about 3 days to a week of time that it will no longer start without a code reader erasing codes and switching it to the on position hoping that the push to start button will finally come on , dealer also cleaned all grounds . And kept vehicle for 2 months. At this point the best bet i have is disconnecting the battery and letting it sit for about a half hour while everything comes back on in which everything will work normal for a few days
Code that shows at the moment is U0100
Well you have a loss of communication on the bus line. That's the computer main line that feeds information from the computers to the sensors and back. Good luck on that one. It's really hell pinpointing those codes. Annie, problem in any sensor wiring or computer circuit can trip that.
