Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
P0191
The difference between the commanded high pressure and the measured high pressure is greater than or less than a predefined threshold for greater than or equal to 1.5 s.
P0192
The ECM detects that the fuel pressure/temperature sensor signal voltage is low for a predefined threshold for greater than.006 s.