Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
P0068
The ECM detects that the throttle position and the indicated engine load do not correspond with the expected load and throttle position for less than 1 second.
P1101
The engine control module (ECM) detects that the actual measured airflow from the MAF, MAP and TP sensors is not within range of the calculated airflow that is derived from the system of models for more than 0.5 s.