Morris Minor Owners Club

...on my friend's Fabia are playing up.

Sometimes it is OK, but sometimes he gets a continuous tone upon selecting reverse, and the graphic shows the car is too close to something when it is close to nothing.
A google search says it is almost certainly a faulty sensor. Youtube shows people 'curing' the problem by squirting the sensors with WD 40. He has tried this, but the problem still exists intermittently.

The rear bumper has to come off to get at the sensors, which is a pain in the proverbials. He is not sure how to tell which sensor might be faulty.

Any ideas?

Thanks,
John

Sensors may well need to be correctly orientated to operate correctly?

When I had this problem on my old Galaxy, it was the wire that was the problem, not the sensors. Visual inspection once bumper is removed and then a simple continuity test to confirm. Saves spending money on sensors if not needed although checking the pins for corrosion is also worth doing.

Thanks folks.

We were hoping to not have to remove the rear bumper.

I think if it starts to fail every time; we will have to remove the bumper.