official l/rover mod for reverse sensors undo senser plugs clean connectors put some vasalene into the endsof the plugs and re connect stops the moisture getting into the plugs and causing bad connections hope this helps just had mine done in wet wet weather mine did give a constsnt tone off evan if you were 10 feet away from the object  rainy-city
xs

Do you need to remove the rear bumper to grease up the connectors?

mine was a rotten loom not the sensors,

so I have a few spare if required

regards Mr C  www.justgiving.com/toptobottomtractorrun
www.top-to-bottom-tractor-run.co.uk
All for The Christie Hospital Young Oncology Unit.
A penny a mile will make Fred smile
Text Fred55 to 70070

yes the bumper needs to come off rainy-city
xs

Diagnosis so far.
1. No PDC front or back
2. Fuses OK
3. Single beep when starting

I've removed rear bumper and checked and vaselined all connectors. But no progress.
I tried to check if individual sensors "click" when approached. Since my hearing isn't fantastic and I don't really know what I'm doing I can't be sure, but it doesn't sound like any of the back ones are clicking.

Does this mean the problem might be at the front?
Any suggestions on next step would be appreciated.

Hi
My problem turned out to be the wiring loom the the sensors was rotten
I have some spare parkin sensors at a tenner each if u need any
Regards www.justgiving.com/toptobottomtractorrun
www.top-to-bottom-tractor-run.co.uk
All for The Christie Hospital Young Oncology Unit.
A penny a mile will make Fred smile
Text Fred55 to 70070

Individual sensors can electronically 'click' as a diagnostic aid but as the range is outside of our normal hearing, your ears had better be good.