I tried the battery disconnect (for 1 hour) and now it works, but only if I'm inside the car. That's progress, but not very useful. Is there a way, other than taking it to a dealership/locksmith, to reprogram it?
Has the remote been dropped or exposed to a lot of water/moisture, sounds like it is working but the signal is very poor and weak? Maybe a broken component on the remote, it’s unlikely to be the antenna in the car