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Phantom ultrasonic obstacle detection

HappyWino

Member
Sep 5, 2019
62
78
NorCal, US
I've started noticing that I sometimes get near constant obstacle notifications come from the back left corner of the car. I can be sat in the middle lane of a three lane freeway and it's just going bananas when there is nothing there at all. The closest "obstacle" is the concrete center divide but if that was triggering it then I'd expect the front left to be triggering the same way.

Anybody seen this and attempted to get Tesla to investigate?
 

eli_

Member
May 14, 2018
375
703
Bellevue, WA
A friend had this problem and it turned out one of the sensors had fallen into the inside of the bumper, so it was just flapping around in the breeze in there and bouncing off the sides of the bumper.
 
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HappyWino

Member
Sep 5, 2019
62
78
NorCal, US
A friend had this problem and it turned out one of the sensors had fallen into the inside of the bumper, so it was just flapping around in the breeze in there and bouncing off the sides of the bumper.

How did your friend figure that out, or did the service folks figure it out?
 

Joshan

Member
Jan 8, 2019
517
927
Chicago
That is usually how I can tell that I have to clean my cameras. I will start to see the half circles on the front or back corners of the car on the display. A cleaning makes it go away for me.
 

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