I haven't been on here in a while. My 2016 2.1 started limping when it warms up. Usually after around 5 to 10 miles. I did all of the basics first. Oil change, air filter, fuel filter, checked intercooler hoses. Cleared codes and the same after around 5 to 10 miles, limp. I can get up to freeway speeds, just slow off the start and going uphills.
Codes are:
1. NOx sensor circuit range/performance bank 1. sensor 1.
2. Turbocharger A underboost. condition.
3. System too lean bank 1
After inspection under the van, I see oily residue coming from the tube going up to the manifold. Now after reading this thread, I think it might be the cracked manifold. I can't see how to check it from the top of the engine. Now from reading this thread, it looks like it's under the fuel filter holder.
By the way, it only has 28,000 miles on it. It's used locally for work and never goes more than 15 miles in any direction from home. But it idles to power the inverter for the grooming equipment and hot water heater.
P.S. It went in last year for the emission recall. Looks like all they did was install a new NOx sensor and flashed the computer.
Also, thanks to all here offering great advice and pictures.