hm...don't know. didn't have any issue like that. but i know when i did fit mine that i had to extend contact plate ends so it sits there nicely and closes the circuit. and now and then i get the error and they go off but as i've said opening and closing the boot usually solves that for a while :D
maybe loose contact?
s3 Ibis White ... Build Thread
/ Black Grill / FbMfSw / Sunroof / Hill Hold / Armrest / Black Leather-Alcantara interior / Rear Parking Sensors / Heated Seats / Folding Mirrors / Cruise / Rns-e mk2 // ttrs-Brembo Brakes / 12mm spacers front / Forge Short Shift + Side Shift / 42dd's / ITG CAI / Forge DV / Forge Catch Tank / Milltek TBE / Forge Twin IC/ Autotech HpFp / H&R ARB's / WALK / KW v3's / RS4 fpr / Loba&Sachs clutch / Revo Stage 2+ / ... and R8 oil cap