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Thread: Rear parking sensors working intermittently?

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  1. Rear parking sensors working intermittently? 
    #1
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    When going into reverse, I get the normal long beep to indicate reverse has been selected. Then sometimes I get the reversing beeps going crazy, sometimes they are fine for a few seconds, then go mental, sometimes they work perfectly fine.

    However, I'm panicking cos I keep thinking a child has run behind the car! So fixing it would be best.

    I've checked all the sensors, they are all clicking away happily. I've enabled the visual parking aid on the MMI screen but it looks like the sensors are playing up equally (I mean there isn't just one which is the culprit, it seems to be random).

    As this has happened after the car was left for a couple of months, I'm wondering if some moisture has got into the main sensor control unit? Anyone no where that might be? Maybe I could dry it out, WD40 it or something?


    No lights on the dashboard, just beeps like mad.

    Any help gratefully received!!

    Cheers, Ed.

    Audi A6 C6 2.0TDI MY2006 186,000miles.
     
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  2. Re: Rear parking sensors working intermittently? 
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    mine did the same the click test lead me to believe it was a front center one. got myself an obd elevan and it is telling me it is rear center left. havent got it change yet, was going to swap the 2 center one to see if it is sensor or wiring

    having trouble with my clutch just now so it has fallen down the list ...
    Stewart
    2007 A6 quattro 3.0 TDI Manual
    1986 coupe quattro (kv) square wheels.
    1972 mini 1400 100BHP A series
     
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  3. Re: Rear parking sensors working intermittently? 
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    But the click test leads me to believe that the sensors are ok, cos they are all clicking away. I need to find the main box, and try cleaning contacts or something.
     
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  4. Re: Rear parking sensors working intermittently? 
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    you ideally need a scan to tell which one or more is playing up.

    Whats happening is that the sensors are working just reading as if an object is close.

    Look at the sensors for a build up of crud ( or car wax) especially around the ring portion, also check that they flush with the bumper as if the have been pushed back due to cleaning this will cause the fault also.

    if you have access to VCDS then the measuring blocks for the sensors distance reading should be looked at to find the culprit/culprits.
    Dan
    2009/2010 2.0 TDIe SE
     
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  5. Re: Rear parking sensors working intermittently? 
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    Ok, I have a friend with VCDS so I'll get a log and see what it says. Cheers.
     
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  6. Re: Rear parking sensors working intermittently? 
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    The mesuring blocks will be better if no code is generated.

    You need to look at the parking distance readings, when they have no objects behind they read 255 you are looking for the ones with the smaller distance.
    Dan
    2009/2010 2.0 TDIe SE
     
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  7. Re: Rear parking sensors working intermittently? 
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    Tried all solutions, but what worked in the end was removing fuses on the drivers side dashboard. Remove, clean fuse with sandpaper, spray electrical contact cleaner into fusebox, replace fuse. Repeat for all fuses.

    Took a while, but it’s been fine ever since. (Fingers crossed)
     
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