Parking sensors! - Alfa Romeo Forum
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(Post Link) post #1 of 7 Old 12-07-16 Thread Starter
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Parking sensors!

Hello,
The sensors on my 159 are on a constant beep as soon as I engage reverse even if there is nothing behind, after reading a few threads I have put my ear to the sensors while reverse is engaged to see if a sensor is dead, but all are making a steady buzzing noise.
Any ideas as if its the sensors that need replacing or will it be the ecu box?
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it could be the sensors or the wiring. they are quite fragile, if you hit them they might be broken

take the car to a dealership, they can diagnose the individual signals with the Examiner (I had the same problem but there was nothing I could do with my DIY equipment)
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does constant beep initiate parking alarm failure code on the dash or not ???...
If not, I would clean main parking socket under rear bumper.
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(Post Link) post #4 of 7 Old 13-07-16 Thread Starter
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No warning messages on the dash, everything behind the bumper seems to be intact, ive ordered 4 new sensors hopefully should solve it.
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Anyway sensors never die all 4 together.
Plug MES ( MultiEcuScan ). It should direct what to do.
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Originally Posted by BuonGiorno View Post
Anyway sensors never die all 4 together.
Plug MES ( MultiEcuScan ). It should direct what to do.
Mine did, after a few months of erratic behaviour.

But I would, and did, try a couple of new ones first just to be sure they were at fault and the cheap ones I had bought actually worked.
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(Post Link) post #7 of 7 Old 22-07-16 Thread Starter
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Parkings sensors are now working again, turns out it was the 2 offside sensors that had failed, both still made the clicking noise but clearly had failed, replaced all 4 just to be sure.
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