rear parking sensors not working

[coldel]

Code reader is the way forwards, plug it in (I bought a Creator C410) and do the testing it will get you an answer in a couple of minutes. And you will have a great diagnostic tool to keep in the car.

[nuddlez4]

Problem solved got a new to me PDC module from best parts on fleabay plugged it in and hey presto the beep returned initially only to stop doing it's thing after a couple of days Did the hearing check ear up against each of the sensors and the nearside sensor was making a weird moaning sound Thought here we go again but after a quick search through previous posts on the forum decided to use the magic fluid trick, WD40, sprayed it on the sensor wiped off the excess and Happy days it's working as normal