bmw 3 series parking sensors

[chezzer]

hi there very recently my cars pdc sensors dont seem to be working properly when u engage reverse the pdc siren just comes on constant even tho nothing is in contact behind ???? hope peeps can help.

[Progressive]

Mine is like this. The problem comes and goes. Pain in the arris. I'm sure there is a way to sort it but I haven't come across one that doesn't involve taking it to an indie and getting the sensors replaced.

[chezzer]

yes mine is the same too its either gonna be the sensors or the pdc ecu i guess.

[Super Veloce]

Turn the ignition on, engine off put the car in reverse, put your ear next to each of the sensors, the one thats not clicking will be the problem.

Order a new one from BMW, they can be ordered pre painted

The push out and clip in.

HTH

D

[4nonymous]

Super Veloce said:

Turn the ignition on, engine off put the car in reverse, put your ear next to each of the sensors, the one thats not clicking will be the problem.

Order a new one from BMW, they can be ordered pre painted

The push out and clip in.

HTH

D

+1.

Listen for the clicking sound.

[LC23]

Mine is also doing this at the moment. Sometimes it works fine, other times it beeps and there is nothing behind. I have done the listen to the sensors route and they are all clicking away. So I'm not sure what the problem is. I guess once I have reversed into something when the sensors have stayed silent it will need to go to the Indy.

[4nonymous]

LC23 said:

Mine is also doing this at the moment. Sometimes it works fine, other times it beeps and there is nothing behind. I have done the listen to the sensors route and they are all clicking away. So I'm not sure what the problem is. I guess once I have reversed into something when the sensors have stayed silent it will need to go to the Indy.

Either all the sensors are dead or it's the control module.

Have you tried reseating everything including the module ?

[LC23]

4nonymous said:

LC23 said:

Mine is also doing this at the moment. Sometimes it works fine, other times it beeps and there is nothing behind. I have done the listen to the sensors route and they are all clicking away. So I'm not sure what the problem is. I guess once I have reversed into something when the sensors have stayed silent it will need to go to the Indy.

Either all the sensors are dead or it's the control module.

Have you tried reseating everything including the module ?

I'm pretty sure all the sensors aren't dead as it still gives me all the warnings when reversing up to something - it's just that they sometimes start beeping when there is nothing there. Plus they are all clicking away. I'd be surprised if they all just died overnight?

How do I go about resetting the module? Is it a battery disconnect job or does it need to be hooked up to a diagnostic machine? Cheers.

[chezzer]

yes ive checked mine sensors this morning they are all clicking away fine how do you go about resetting?? cheers.

[Super Veloce]

chezzer said:

yes ive checked mine sensors this morning they are all clicking away fine how do you go about resetting?? cheers.

Was this after the constant beep?

mine was fine one of the sensors was intermitent.... so timed it right...

[chezzer]

yes just after the beep

[Super Veloce]

I would do a reset then.... do you get any PDC function from any of the sensors?

[turbo-ww]

Might sound silly but are they clean?

Mine did that after a spider made a small web over one - Cleaned the web off and they worked fine again!

[chrisx666]

One sensor had a corroded connector on my old E46. Same symptoms.