Ok long story short bought the car turned on the defrost and a check engine code popped up for no cluster bus messege p1687 shop said bad pcm had it replaced day after shop it came on again they cleared never came back on again i noticed it happens when i use the defrost went all summer without using defrost so all was fine till the first cold day i used defrost an bam on again same code shop doesn't know what the hell could it be