Battery drain issue: possible solution

[Roger77]

I Bought a 2017 MKX BL in June, It has been driven on a regular basis BUT the battery would drain. This has happened twice in 3 months.
The battery was tested and it was OK.
I ran some tests to find a parasitic drain and realized that if the keys were close to the car it would show a drain on the battery of about 4.5amps (that's a lot)
After scratching my head for a while I realized that the proximity sensors on the car were drawing power from the battery.
I had the keys in my pocket.
So I moved the keys to another room and tried it again, no power draw and no flashing lights.

The MKX has a feature that senses the key and when you get close to it the lights turn on.
Is it possible that due to it sensing the key it keeps the proximity sensors active.
I suggest that anyone having a problem with a draining battery that is intermittent and not due to battery problems, keep your keys at least 20ft from the vehicle when its parked.
I normally keep the keys next to the garage door, so less than 5 feet from the car. I'm going to try leaving them in the bedroom to see if this solves the problem.

 

[Reyhook]

I Bought a 2017 MKX BL in June, It has been driven on a regular basis BUT the battery would drain. This has happened twice in 3 months.
The battery was tested and it was OK.
I ran some tests to find a parasitic drain and realized that if the keys were close to the car it would show a drain on the battery of about 4.5amps (that's a lot)
After scratching my head for a while I realized that the proximity sensors on the car were drawing power from the battery.
I had the keys in my pocket.
So I moved the keys to another room and tried it again, no power draw and no flashing lights.

The MKX has a feature that senses the key and when you get close to it the lights turn on.
Is it possible that due to it sensing the key it keeps the proximity sensors active.
I suggest that anyone having a problem with a draining battery that is intermittent and not due to battery problems, keep your keys at least 20ft from the vehicle when its parked.
I normally keep the keys next to the garage door, so less than 5 feet from the car. I'm going to try leaving them in the bedroom to see if this solves the problem.

Or, in the future, a voice command to enter the vehicle; i.e.,

Dave: HAL, open the car doors, please.

HAL: I can't do that, Dave.

 

[enigma-2]

Another option is to place the FOBs in a rfi case (blocks the emf).