Hello,

Just got in my car and went to reverse it and the back mid right sensor indicated there was something right up to my car and beeped. I got out and checked, nothing. Drove for a little bit and checked again, same thing.

 

It was wet from rain an hour ago so I gave it a little wipe and tried again, it seemed to work for a few seconds so I assume it's some kind of intermittent electrical fault? Anyone ever had this issue? Cars a 2010 MK2 vRS.

D-OH!

 

In my experience a dirty film on the sensor can often cause erroneous beeping, thorough cleaning will stop it.

 

It can also be a sign of impending sensor failure when it becomes more susceptible to dirt.

 

I've read it many times about water ingress, the sensor is a sealed plastic unit and the electrical connection is sealed so I very much doubt water is causing electrical issues other than being a film on the ultrasonic emitter/detector.

 

Good sensors emit a faint ticking sound, select reverse gear with ignition on to check.

Edited 25 August, 20187 yr by MicMac