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Check your hood alignment sensor for the alarm and the trunk sensor
i have a 1999 avenger and my alarm would go off for no reason at all so what i did was take out the fuses for the alarm and the horn and it seem to work. (fyi after doing so your alarm will not work) if your alarm goes off and you do not have a remote- put your key in the passenger side door and turn it to the left... it will turn off the alarm... OR I think i tried the passenger door and it would not work for me. I know that you can unlock the trunk and it will disarm.
some of them do. the v6 in an avenger would be a 2.5.
the avenger
I had a similar problem when I first got my Avenger. My remote was not working, so everytime I locked the door ( while open)the alarm would arm. This is the trick: Lock the door when it's closed, don't lock it when it's open otherwise the alarm will go off. OR You can disarm the alarm by unlocking the trunk with the key. I learned of this from a Dodge dealership. Had issues with the remote and once you lock the car from the inside or out it is armed. I ran into times where i would lock the door after getting in then once i started the car alarm would go off or once locked you cannot open the door from the inside or alarm will go off.
A loose wire would cause the horn to stop working on your Dodge Avenger 2.4L engine.
your cabin filter might be dirty
I received these error codes for my 1998 Dodge Avenger, 6cyl. 2.5 What does these codes mean? Where would I start to fix these issues? ~THANK YOU ~ P0108 P1297 P0401
Could be the alternator has failed.
A broken spring retainer in the shifter.
The dealership would be a good place to start.
I had a 96 Stratus that would do that, and it turned out to be that the starter was bad.