Krown undercoat knocking out parking sensor

Hello People
I had Krown applied a couple days ago and the next morning my rear right most parking sensors was not working.
Did not happen driving around all day after the Krown application.
I have an appointment at the dealership to diagnose the issue.
I'm wondering if anyone has had a problem after rust inhibitor application.
Cheers
2025 SR5 Offroad Canadian version

 

Hmmm, sorry to hear this. Did a Fluid Film undercoating a few weeks ago but didn’t have this issue.
Maybe a dumb question but did the slop a bit of it onto the sensors?

 

The outside is clean as new. I looked at the back side to see if I could see anything alarming, and noticed there is a cover over the sensor area, probably to protect it from road salt an debris.
So I didn't investigate any further.
My concern is if the service tech tries to connect the spray with the sensor issue!

 

Update:
I disconnected the negative terminal and re attached it and my issues where resolved.
A self fixing vehicle!

 

Man, I'm glad I don't live in a climate where I have to have the underside of my vehicles sprayed with oil to keep it from rusting out. Reminds me of the current generation of GM 1/2 tons that come with that black, oily crap on the frames from the factory. Makes doing any kind of repair or maintenance a total mess.

 

I here ya.
Fortunately I won't be the one working on it for 84 months!
I sleep better with the extended factory warranty.