X5 parking sensors

[peaktorque]

My dad is experiencing problems with the parking sensors on his 4.4 X5. "PARKING SENSOR FAIL" is displayed on the dash. He has since purchased a new sensor and swapped with each old one (subject of illimination!), but the problem persists with all sensors tried

Any ideas?

P.S he has sensors on the front too (not sure if he has tried swapping them yet, as it only happens in reverse)

[blackspider]

With it in ignition on and in reverse with PDC active,listen and gently touch each PDC sensor.They each give off a constant click which can be felt-they should all have an equal sound and feel.
Check each sensor for scratching on each sensor head-this can cause sensor so over react and fail.
You may find more than one has failed-not uncommon,in which case you will never find the fault swopping with one sensor.
The best way to find out if one or more sensors have failed,which one has failed and if its a wiring or control unit problem is to have a diagnosis test done with GT1(BMW diagnostic computer)

[jamoor]

These sensors in general are a pain, 4 sensors failed on my car

Check for clicks, if not get diagnostics either off ebay or go to a dealer

[peaktorque]

[peaktorque]

blackspider said:

With it in ignition on and in reverse with PDC active,listen and gently touch each PDC sensor.They each give off a constant click which can be felt-they should all have an equal sound and feel.
Check each sensor for scratching on each sensor head-this can cause sensor so over react and fail.
You may find more than one has failed-not uncommon,in which case you will never find the fault swopping with one sensor.
The best way to find out if one or more sensors have failed,which one has failed and if its a wiring or control unit problem is to have a diagnosis test done with GT1(BMW diagnostic computer)

O.k tried this and found one that doesn't 'click' (second from left). Is there a reset procedure needed when fitting a new sensor? As when the new sensor was swapped the fault still existed (hasn't re-fitted this yet, this was done when originally trying to find the fault)

Thanks

James

[peaktorque]

It was a broken wire!

[Mad March Taffy]

Same problem on wife's 1 series - BMW want £150 just to diagnose the problem!!!