Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
i have a no crank conditon when it is left outside over night i then pushed it inside the shop and afetr warming up for a short bit started . when it would not crank the dash lights would shuit off when i trued to crank i checked the groungs they are ok. it has some loss of module communication codes and aa bcm low voltaghe code . now in the shop it is starting normally . Any input would be appreciated