Today we brought our truck to a guy that specializes in fuel line issues here in Austin, TX. We finally bought a device to reset the code back in Sept so we haven't been wasting time waiting for limp mode to clear on its own. That seemed like major progress at the time.

However, the whole issue seems to be getting worse and becoming more of a pain to reset while driving, especially in traffic. We feel that towing 12a + ton toy hauler and dealing with these limp mode issues is going to become unsafe at some point. The code is now setting at lower temps than before (low 60s) and while going up minor but long inclines. In a nutshell the issue seems to be getting worse.

Once we get our official diagnosis I will post back here.