I got in my car last week and the dash said my hood was open. I got out and and checked to make sure it was latched which it was. Has anyone had a problem with the sensor being faulty? If so where is it located and is it easy to replace?

The bigger issue is now my alarm goes off randomly throughout the day becuase the alarm system thinks the hood is open when it is actually not.

2002 A4 1.8T

Thanks for any help.
Greg

 

The exact same thing is happening with my car, did you ever get a response on how to get it fixed?

 

It is a micro switch under the hood latch. With a light you can see the wires coming up between the fans and going to a switch on the left side of the latch. When the switch is closed (your hood is closed) the signal to the alarm is open and when the switch is open (hood opened) the signal to the switch is closed.
I was having trouble with mine, and I cut the wires to the switch. At first I twisted the wires together but the warning light stayed on. That's when I discovered it needed to NOT be touching together. So now the wires are just taped together, with not bare wire showing and not touching and all is well.

 

thanks. very helpful