BACKUP ALARM False beeping--FROZEN OR DUMB?
 

Well it was -27 degrees in Canada's capital and I was backing into a parking space, and the backup beeper starts beeping like crazy but there's nobody and nothing behind the truck. I had cleaned the road salt and grime off the bumper sensors and they were nice and clean.

Has anyone had their backup alarm false trigger in extreme cold?

The exhaust was thicker than usual because of the cold, so was the truck just beeping at its own exhaust telling me to be careful not to hit it? Its a little milder today...no problem.

Yes, mine has also done that when it was really cold out, not sure what the cause

a small amount of water seeps into that microscopic oval in the center of the sensors...ices up and causes that...get that cleaned out and you'll be back in business...if you want to fix it...get a hair dryer and a rag and you can have it back in order in ten minutes....at least until they get wet again...

Yeah.... they do not like the cold. I just live with it.

Mine does it all the time and was basically told that they cannot be adjusted and to just live with it. A lot of good it does.

even when the sensors are clean if it is really cold sometimes it will sense the exhaust to be a solid object. the lighter you are on the throttle in reverse - the less exhaust. this will minimize it. trust me i live in northern alberta and it gets A LOT colder than -27C