P291B Engine Code

Recently got a new engine installed in my 2012 V6 TRD Offroad. Long story short, inherited the truck from my grandfather. Super stoked to get it and decided to take a trip to visit family in Colorado and enjoy the outdoors with it. Engine overheated in the middle of Iowa after a coolant leak caused the belt to break. Unlucky circumstances and decided to replace the engine while in CO. Made the trip back to Chicago and during day 2 of the drive the check engine and trac off lights came on. Due to the traumatic experience on the way to CO, I took it into a local o'reilly's to pull codes. Came back with P219B and was told I could finish the drive. Ended up completing the next 6 hours with no issues. Going to get an oil change after the ~1,000 mile trip with a new engine and will have them look further into the code. Seems like the code could mean a lot of things, but based on the situation and background given, any ideas on what I should expect?

 

That code is a bastard. It can either just go away or take a huge amount of work to isolate the issue.

You need to start by looking and analyzing fuel trim, then work your way down to the issue.

I apparently gave some sound advice way back when, but you have a possible mechanical failure with the overheating.

https://www.tacomaworld.com/threads/p219b-code.499052/