× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: P1391, cmp, ckp waveform
Posted to Technical Discussion Forum on 12/11/2015 2 Replies

That signal is there with the engine cold, and it runs perfectly. When it starts cutting out, the cmp sensor drops off. I'm not ruling out the ckp yet, because that signal does concern me. Login to read more.

2 Replies Received (View Replies)