Rear Parking Sensors not working

[hughmungus]

Had a trawl of this and other sites and cant find a definitive answer so am hoping someone has had a similar issue with their rear parking sensors.
When I select reverse I get a continuous tone for around 5 seconds and then nothing, it doesn't detect anything at all.

So far I have checked the sensors and don't detect any clicking of vibrations to indicate a fault. I presumed therefore it was a bad PDC module so have tried another one from a friends car with no difference.
Is it possible for all 4 sensors to fail together, or is there another cause/solution please as it driving me daft.

 

[sjscott]

Could be all 4 sensors but it doesnt seem likely,

I get the same tone but only the one of mine doesnt click.
if it isnt the module have you checked the power to the module? Fuses? Cable break etc?

 

[hopz121]

One of your sensors is or has failed would be my guess

put your hear close to them and you will hear a clicking, if you find one with a fainter clicking than the rest or no clipping at all then you have found your issue

 

[hughmungus]

Thanks for the reply chaps, I have listened to all 4 sensors and none click, I get a continuous beep for a few seconds then it goes off and then nothing including no click fron sensors.
Could this be a fuse ? maybe.
They did all work up until a few months ago but its now driving me mad trying to find a solution. :headbang:

 

[leonfr]

I have exactly same problem so would be interested in peoples thoughts !

 

[hopz121]

I would say either the module or a fuse then.

It seems weird all sensors would stop working at the same time

Maybe check fuse and go from there

Ash

 

[rajen44]

I had the same issue. However, after a few times I did finally feel the click on the other 3 sensors. So it wasn't consistent that all the sensors weren't clicking. Try it a few times then you might be able to catch it.

 

[no fit state]

The clicking noise is a sign of working sensor but is so faint it is hard to detect sometimes. If you're anywhere near Milton Keynes I could hook it up to inpa and test them for you.

 

[jabber]

I had a similar problem with my zed had one sensor changed and it worked for a while then stopped again ( long tone no beeps ) removed the bumper and disconnected all the sensors and cleaned all the connecters and it has worked every since. So with mine the cause was 1 faulty sensor and bad connections.

 

[instigata]

Had the same problem and looked for answers on the forum. I did have one bad sensor, but a bad battery was one of the possibilities too.

 

[Argenta]

Have the same problem now.. Beeeeeep!

I've had my bumper/sensors off the car for paintjobs etc. It's put back carefully with everything properly connected.
Would driving without the sensors give a fault code which I need to reset to get them working..?

 

[firebobby]

I have the same issue, the sensors seem to be clicking so I will try electrical cleaner on the plugs and see if that helps 1st.

 

[Argenta]

Funny enough, the sensors decided to start working again..
Maybe a question of electronics settling in after being off while driving.