Just noticed It is on. Turned engine off and on, but still it stays lit and solid. The car recently had an MOT and ful service, plus the gearbox bearings were changed. Any ideas on the light at all guys? And where is best place to get it checked out. Also, can anyone recommend a diagnostic tool that I could use? I see amazon have a few but dont know which one to get. And, where do those things plug into the car?