02 Elantra alarm goes off on its own

My '07 Sonata did the same thing right after I bought it. The easiest fix is to remove the wiring harness from the switch that tells the system whether the hood is open or closed. Mine was on the right fender, near the edge of the hood; not sure where it is on an Elantra.

Mine ('01 Elantra) was because of a bent hood. I took a rubber stopper and hollowed out a thin hole so I could slide it over the switch, so that the hood would still close it.

I think the

manuals will list all thesensors, and you can fiddle with them to figure out which one is bad.

A neighbors 2007 Sonata had a similar problem & upon investigation it had to do with a wire short circuiting in the space around the steering column. I think it was this forum which pointed us in the right direction...

If you don't lock the car with the remote, the alarm will not arm.

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It sounds like a very common problem with the VW Jettas. I finally disarmed the whole stupid, over engineered system. Not the right solution if you want an alarm...................