Hi Guys, I have the VF SSV LS3, I had service ESP light come on with traction control light car would run and drive rough even through the auto gears,, scanned it cylinder 4 misfire, if cleared car would run perfectly, but then come back on eventually, obviously not injector, I replaced coil pack and whilst at it new ngk plugs and eagle 8mm leads, I used heat shields off the old leads on new ones, although I didn't like the feel when doing so, started her up and ESP and traction light are gone, ran perfectly ,but engine light remains on not flashing in tacho side, scanned and got P300 multiple misfire, then I pulled all heat shields off and tightened 2 plugs a little more, car runs perfect but engine light remains, thinking of disconnecting negative off battery for a while and then reconnecting it, hopefully that may solve??, otherwise it's a Holden job, need to know when disconnecting battery will it effect mylink stereo, will I have to put pin code in, if so has anyone done pin code before.