PDC/ Parking Sensors - 6cm of Death

[Nognar]

Evening Ladies and Gents,

So the PDC on the S8 D2 started to just do the long beep, light not flashing but clearly something up with the parking sensors.

Hooked up VAGCOM, no errors but Rear Left Centre Sensor was showing 6cm on the measuring blocks and the rest were 255cm and voltage all good at 12.9v.

Right then, new sensor ordered (4B0 919 275 A) and put in, though this made no change and still constant beep with 6cm showing in VAGCOM.

Other sensors seemed to work and respond etc on VAGOM so swapped over a working one to the location of the 6cm one, same result.

Cleaned all the connectors, checked the wiring looked ok and nothing broken/ fallen off and used some contact cleaner into the connectors also.

Same result........

Rear Left Centre Sensor 6cm.

Next step was to order a spare PDC ECU from A8 Parts (4D0919283) to swap over.

Did all of that work and replaced the PDC ECU.

Still.....


Rear Left Centre Sensor 6cm.


Therefore could I ask for the collective wisdom of the group in case I am missing something really obvious?