Hi all,
Can anyone throw some light on this problem its been fine since bumper job until a few days ago and starting getting this message. i got out the multimeter and have feeds and earth to both sides of main plug and same at sensors ,i cant get a ticking noise as it seem system has shut down is there a way of checking sensor output wire signal or am i looking at an ecu fault.Rear sensors seem to b ok although not sure, just getting long tone on selecting reverse then that stops and light on switch flashes and message comes up.Any ideas lads

Pretty sure you will find its a front sensor or two - causing the issues they don't last forever & are battered daily by the elements

You can have the fault codes read which may pinpoint the exact location - IMO - it's a bumper off job - not hard but the fixings corrode causing problems ;( 16MY Estoril Blue SVR.............
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Yeah i,m thinking i,ll try sensors first you can get them on ebay cheap and it was all ok before i did the bumper spoiler so easy to remove bumper again and you know its always the same ok till you touch it .thanks for advise [/b]

If it was ok before you did the bumper spoiler, then I reckon you've disturbed or caught some wires.  Bodsys Brake Bible
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no all ok mate just took bumper off again this morning to check all the plug on sensors so did a continuity test on harness and main plug all ok sure its sensors so just order 4 i think it might be all the sanding and pulling about knackered one or more its been playing about for a few days now

All sorted 4 new front sensors of ebay bumper back on started it up 1 sec beep light on and all back to normal chuffed to f and no where near a main dealer While i'm on the guy that posted about sensor problem in tech section i dont know what fuse you took out but the one marked parking sensor and tyre pressure mon, if you remove that car wont start and gearbox fault (F in display) comes on and message saying limited gears available so this is not a good idea luckily arn up the road seemed to reset this.