P219B Bank 2 Air/Fuel Ratio Imbalance

OBD II fault code P219B is a generic trouble code that is often defined as, “Bank 2 Air/Fuel Ratio Imbalance”, and is set when the PCM (Powertrain Control Module) detects an imbalance between the air and fuel components of the air/fuel mixture on Bank 2. On V-type engines, Bank 2 is the bank of cylinders that does not contain cylinder #1.

NOTE: The word “often” used above is rather important, since at least 12 carmakers, including Jeep, Ram, Chrysler, GMC, as well as GM and Ford (and their related makes) use varying definitions for this code. While all known variations describe an air/fuel mixture problem on Bank 2 as the result of largely identical causes, the sometimes wildly different wording used by some carmakers to define/describe this code can and often does, create some confusion about the actual meaning of the code.