So my key fob quit working for my remote start and keyless entry and i went to advanced auto and used there tester there and it did say it was putting of a signal but the green led lights up when i hit a button i changed the battery and still noting it worked when i got out of my car and went into the gas station when i locked it but when i went to unlock it everything just quit working so dose anybody experience this befor and know how i can fix it? Can i get another fob from a car and the junkyard and program it to my car? Or do i have to get a new system?
Thanks Steve

 

You would need a new fob from the manufacturer. I don't think our vehicles came with keyless entry or remote start so I am guessing you have an aftermarket set up. If that's tru it could be a simple loose wire. Check the main power and ground, clean and tighten. If still happening might need to replace the unit.