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Thread: E46 PDC sensor fault

  1. #1
    BMWHaus Guru
    Join Date
    Oct 2018
    Posts
    1,118

    E46 PDC sensor fault

    Hi,

    The PDC sensors on my e46 coupe don't seem to work. I get about a 5 second long beep when I first put the car in reverse after each startup, which I understand signifies a fault with the system.

    I have tried that DIY test where I put the car in reverse with the ignition in position 2 and walked in front of each of the sensors to hear if they make a clicking sound, but none of them make any sound. Does this mean all of the sensors are faulty, or does it signify a problem elsewhere (e.g. a connection or cable somewhere)?

    Has anyone had this issue before?

  2. #2
    BMWHaus Contributor
    Join Date
    Oct 2015
    Posts
    282
    Could be the PDC module. It’s part number 1 in this diagram:

    http://bmwfans.info/parts-catalog/E4...e_control_pdc/

    Happened on both my e46s. I think on mine 2 were clicking. It’s located in the boot, behind the grey carpet panel on the right hand side. If you’re replacing it then get a new genuine one though. I tried 2 second hand ones on eBay and none of them worked. It would obviously be better if you could try out a working one but not sure if that’s an option.

  3. #3
    Try one from from another car,before you buy.there about 220.00

  4. #4
    BMWHaus Contributor
    Join Date
    Oct 2015
    Posts
    636
    mine makes now sound, but I think i can hear all sensors clicking.. Might try replacing that module then. I also heard that two outter sensors must have to be genuine ones

  5. #5
    Could be gong gone,the big lad on the nangar road should have a modoul,swap it out and if it works buy it,he wont mind trying it there and then or,he can hook it up and it will show faults,

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