Just got Ae and learning how to use it. Got the p1668 code on cyl cont test. I found that is a pcm idm communication error. I see that it could be an open fuse, idm relay, shorted idm circuit, pcm short, ect, My question is how and where do I start elimimating what could be causing this. Thanks

 

Are you having any driveability issues? Or just looking around? I wouldn't worry too much if all is going well.

 

Have a little of a rough idle, but that i think is due to original injectors with 330k on them. ( New ones on the way)No real issues just looking around