You have two separate circuits in the door handles.
The first system are the switches located under the black buttons that are used to lock the car. This is separate from the antenna and should be treated as separate.
The switches can fail to activate when pressed or activate when they are not pressed.
If the switches fail to activate, this will not produce any errors in the scan. The only problem will be pressing them will do nothing. The switches can also activate when they should not. This will produce errors such as the famous Move Selector to Position Park message.
Now. Can the black switch ever cause the battery to drain? Only if it keeps unlocking the doors over and over. This is obvious as the vehicle will randomly unlock itself. By the time that is happening, you will also be getting random unlocks while driving and be seeing the switch to park message.
Now the second are the antenna problems. The actual antennas almost never break. The are just a wire, much like the in-glass rear radio antennas. How often do they fail? Not often.
At this point, many are thinking this post if full of crap. Antenna problems are common as dirt. Close to being right but not right. It is not the antenna that is broken.
Antenna problems 99.8% of the time point to bad mosfets in the kessy. This is an extremely common problem, but it is an electronic problem on the circuit board, not the antenna.
Antenna problems will drain the battery each and every time. You will rebuild or replace the kessy module to fix this problem.
So, hopefully now everyone understands that there are two separate systems here. One system deals with the black push buttons that lock the car. The other system deals with the antennas that unlock the car. Each are separate and each can be disabled while leaving the other one working.
The first system are the switches located under the black buttons that are used to lock the car. This is separate from the antenna and should be treated as separate.
The switches can fail to activate when pressed or activate when they are not pressed.
If the switches fail to activate, this will not produce any errors in the scan. The only problem will be pressing them will do nothing. The switches can also activate when they should not. This will produce errors such as the famous Move Selector to Position Park message.

Now. Can the black switch ever cause the battery to drain? Only if it keeps unlocking the doors over and over. This is obvious as the vehicle will randomly unlock itself. By the time that is happening, you will also be getting random unlocks while driving and be seeing the switch to park message.
----------------------00488 - Rear Right Outside Door Handle Central Locking Button (E372)
007 - Short to Ground - Intermittent
Now the second are the antenna problems. The actual antennas almost never break. The are just a wire, much like the in-glass rear radio antennas. How often do they fail? Not often.
At this point, many are thinking this post if full of crap. Antenna problems are common as dirt. Close to being right but not right. It is not the antenna that is broken.
Antenna problems 99.8% of the time point to bad mosfets in the kessy. This is an extremely common problem, but it is an electronic problem on the circuit board, not the antenna.
Antenna problems will drain the battery each and every time. You will rebuild or replace the kessy module to fix this problem.
-------1 Fault Found:
00180 - Access/Start Authorization Antenna; Passenger Side (R135)
009 - Open or Short to Ground
So, hopefully now everyone understands that there are two separate systems here. One system deals with the black push buttons that lock the car. The other system deals with the antennas that unlock the car. Each are separate and each can be disabled while leaving the other one working.