Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
If it's a aftermarket key fob you'll need to read the instructions to set it up for that car. Then follow the programing instructions after putting car in learn mode with a capable scanner
