The P219B is a fuel mix unbalance in the bank with the even numbered cylinders, the passenger side.
Look for an exhaust leak (exhaust manifold, or a vacuum leak (intake manifold).

 

Thank you, yeah I guess I gotta find a smoke blower to smoke the intake. I did a search for the symptoms on here and found almost the EXACT same post with the EXACT same codes. March of 2022. It was from ME! On the same vehicle. I corrected the issue at that time by cleaning the throttle body, but I can't remember what I used.

 

Dirty throttle bodies can cause some grief, all I use is the products sold in car parts shops that are made for TB cleaning.

If you want to find a leak in the intake gasket, just turn on a propane gun, don't light it and play it along the gasket, if the engine revs change, you found the leak.

 

Tried the propane and it found nothing. Hell, I even stuck the tube up to the intake (with intake hose removed), vehicle running, could hear and feel propane coming out...still didnt change the rpm.

 

Forgot to mention...If I clear the DTC's it'll run great for a couple drive cycles. Then it will get raggedy.