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Very interesting post. 1st, there MAY BE some OBD-II devices that are 'ON' all the time. Power IS at the OBD-II connector all the time. You will have to do some due diligence to make sure the devices you or anyone else installed are not 'on' all the time.

Another issue that I have not heard of lately, IF you purchased the car 'USED' and either financed it or rented to own (there are a few but far between sellers that do this), you should check to see if there is a tracking device installed (by a service that guarantees they can find the car if the payments stop or are missing for a few months). These GPS/immobilizer devices are in many cases a 2 way device. Not only will it tell the monitoring station where the car is (passive) but for a few dollars more (to a monitoring company) they can and will 'DISABLE' the car until it is picked up by a contracted rollaway. Our cars are old enough to have been with a couple to many owners, and any one of the intermediary 'stops' for a new owner may have included these devices. If it is installed, they would be the type that are 'ON' 24/7. Just an FYI, be aware!


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