I did the rear locker mod awhile back without cutting the speed sensor wire(purple). I used it last night in the snow and now my check engine, scid control, vsc lights will not go off. ABS, 4x4 and rear locker on demand still works but nothing else. Which I don't mind in the snow. I'm due for an inspection at end of month and the check engine light has me worried. I hope disconnectioning batttery will reset everything. Does anyone know the cause? Maybe driving over 30mph and not cutting speed sensor wire? or is this a common issue?