just a quick question. i just changed out my coolant temp. sensor on my 95 pathfinder because i am having a little trouble getting it start right up when it's cold out. by cold, i mean 20 or below. i have read that this might help. while i did this i also cleaned my throttle body with spay cleaner because it needed it. all went well with both jobs but when i started it back up the check engine light came on..... i have the truck for over a year and the light has never come on before. i'm just curious if anyone might have any input on this matter. thanks.