2005 Cadillac STS V8. What is the fix for trouble code P0174..?

Question

2005 Cadillac STS; V8 with 123,748 miles.
Great car but I've been getting the check engine light and trouble code P0174.
It goes on to say Fuel SYS1, CL (which I'm assuming means closed loop), using H02S.
I get the same message for Fuel SYS2.
My question is... Since this typically occurs when the car is sitting for a lengthy period of time idling, do you think the fix would be to replace the oxygen sensors...?
Thank you and advance for your help.

Answer 1

This code is usually the result of a bad O2 sensor, intake manifold gasket leak, low fuel pressure or a bad mass air flow sensor.

Replacing the bank 2 front O2 sensor is not a bad place to start.