Parking sensors randomly started working after 8 months
 

I bought my 4.8iS 8 months ago, and the seller told me that 1 or 2 of the PDC sensors didn't work.


I did the 'click' test last month, and could hear that 1 rear sensor and 2 fronts were silent, so purchased replacements to fit when I get time over summer.


However, last week for the first time since owning the car, whilst reversing the sensors started working! I was (pleasantly) surprised. They've worked a few more times over the week, but not 100%. Maybe half the time I've reversed?



I don't know if it's due to being summer here in the UK and we've had some fairly warm weather and they've dried out, or if I had a lose connection somewhere that's making contact? Any ideas as to where to look or what to check?

There could be some corrosion on the connectors especially if body work was done and the seals were damaged. If you bought cheap replacements they will be worse.