Link to Cam signals Post Repair- https://www.youtube.com/watch?v=CP_ec6y-VGQ
I show you from start to finish how I diagnose a P0022 or P0012 trouble code on a Ford Superduty, F-150 etc. I use a basic Picoscope; link where to purchase below.
This “scope” is just a really fast voltmeter. If you don’t want to be a “parts changer” you HAVE to use a scope in some cases; it’s the only way to diagnose CAN bus networks and as seen in this video, scopes provide definitive evidence to warrant further diagnosis’s.
https://www.amazon.com/Pico-PicoScope-2204A/dp/B00GZMRZ3M