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V83500

Unusual PDC fault

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Hi

I new to forum and looking for advice. I have a have a fault I have only owned the car for a couple of months and am rectifying faults as I go. The pdc didn't work at all I replaced all sensors Nothing!! Found water damage on ecu replaced Nothing!!! Found a trapped/crushed wire behind front bumper and hey presto they work perfect front and rear. Here comes the problem with ignition on engine off they work perfect start engine and middle 2 front sensors detect something 10cm in front of vehicle. I have checked this with OBD and no faults showI can only think some sort of interference. Anyone got any ideas

Edited by V83500

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Welcome.

 

Could be something on the 'lens' of the sensors.  Occasionally in very heavy rain both my E60 and F10 sensors detect something that isn't there.  Polish can also affect the sensors reliability.  Make sure they are clean.

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