Weird.

I bet it will be back.

Sorry, I don't want to be THAT guy, but this kind of thing usually doesn't fix itself.

Either way, drive it for now and see what happens. I'm curious, too.

Well it came back like you said it would. I had to get gas and I noticed a little something on the rubber part on the gas cap seal. A piece of paper or leaf or something. After I cleaned that off the check engine light went away. I drove the truck for a couple hours after that and the light went away. Do you think that little piece of something wasn’t letting the gas cap have a complete seal and that could’ve been the vacuum leak?

Yep, it doesn't take much, and it is measuring this often.

Glad you got it worked out!

It came back! I thought I figured it out. Back to the drawing board I guess. I found out though that my pcv valve isn’t changeable. It feels like it is part of the valve cover.

PCV won't be a major leak that it cares about. It'* probably something else on top.

It came back! I thought I figured it out. Back to the drawing board I guess. I found out though that my pcv valve isn’t changeable. It feels like it is part of the valve cover.

Well I’ll start the hunt again.

So the check engine light came back on. My driveway has a decline to it and I back in so the front end of my truck is pointing at a down weird angle. I started the truck up this morning and the light was gone. I just installed the Mishimoto performance transmission cooler yesterday is the only difference. After I installed it the light was still on. Does this information provide a direction to look for the issue causing the p219a code?

I think that'* a coincidence.

So still am having the p219a code come and go. This time I took some screen shots of the scan till readings. Anyone seeing anything that would cause this code? Any help would be appreciated. Also still looking for a vacuum leak.