disconnected the battery for 15 mins and reconnected but the warning lights remained. the nct chap said it's only a visual retest. no charge. i've been driven mad the past few months by this buzzing/vibrating/crackling noise that seems to be comin from the back of the dashboard. when the engine is really working on the motorway that's when it happens. investigating around a month ago i found a single hexagonal bolt just sitting near the engine. what the fuck is that off. it must be rattling around and causing the noise but the noise remained. when i was disconnecting the battry i hadta remove the air filter box to loosen the positive cable and happenned to look at the filter. was'nt sittin properly. there was a sheet of foam from the fuckin box still stuck to the filter. the filter box is bolted down from the inside with 3 hexagonal screws with 1 missing. when the engine is working hard the box is vibrating like fuck and causin the noise. jaysussssssssssssssss