Question

I have a 2010 Dodge 4x4 Cummins Diesel with the engine code P226B. What caused it & how to repair it?

Answer 1

P226B Turbo charger boost pressure not responding

When this code condition occurs the turbo position is in the commanded position during the dessot, this is one of the set condition,,Other than that the  available fix as long as there is no EGR code ,or MAF (Mass airflow ) code condition or any intake vacuum leak ,is to do a turbo cleaning,This code is also known as P2262 and is treated the same way. Use only Mopar turbocharger cleaner # 68044565AA this is a water based cleaner,, In this particular year and make the cleaning port may not be available and you may have to install one.see if you have this port ,this is the cleaning port.

Answer 2

P226B Dodge Code - Turbocharger/Supercharger Boost Pressure Too High - Mechanical
Read more: https://www.autocodes.com/p226b_dodge.html