The last couple days I am getting a phantom back up obstacle warning from my reverse sensor just after I put it in reverse then touch the gas. I get 3 rapid pings then another 3...I checked the sensitivity getting close to stuff and that works but i cannot figure out why it pings right off the bat with nothing in the way to set it off.
any ideas?
cheers,
P

I should add it was wet and rainy out, the sensors were clean on the outside..should I try and clean out the road crap from behind the bumper or will spraying water in there cause more issue than its worth?

Today it was dry and no beeping...I hope it is not a wet issue!