If I lock my car with anything but the key from the outside the alarm goes off. Which includes hitting the lock button from the inside or locking it with my key fob. I don't know why this would be happening.
I have the same issue. I know this is not a true fix but I had a keyless entry installed and I do not use the buttons on the door anymore. I can't use my key or it sets the alarm off if I locked the door with the door button.
I actually just developed this issue myself over the last few days. I'm going to give this a shot this weekend after I get finished up with the clutch. https://www.youtube.com/watch?v=X07aa5mYEZk. I'll post back with results, worse case scenario I have to solder some wires back together.
I bought the car knowing it had some mechanical issues but the guy didn't tell me about the electrical issues. I've been stuck in parking lots a couple of times now. I've been able to get by with disconnecting the battery for a couple of min to reset everything. After reconnecting it works fine for about a dozen starts and then goes back to the alarm going off when I open the door and won't start with the key without disconnecting the battery.
Not sure if you got your issue resolved. I tried that bypass and it didn't help. Still having the alarm go off on occasion when I unlock the car with the key. Can't get anything to function until I unhook the battery for a few and then it's fine for awhile after that. I'm wondering if my key is potentially going bad :shrug:. I only got one key and no fobs when I bought it so haven't really been able to test it that route. There are a couple of other more pressing issues I'm sorting out before I bother getting the additional key's and fobs.