P2096 post catalyst fuel trim bank 1 system too lean

SOURCE: service engine soon light on, says bank 1 and 2 lean

this code sets when more air is entering the system than is designed to. the computer is having to overcompensate by adding more fuel. usually this code is associated with a vacuum leak, either a vacuum hose or a leak at the throttle body gasket, intake gasket, or another gasket on the intake manifold. if your vehicle has a mass air flow sensor (as opposed to a MAP sensor) a dirty or faulty mass air can cause both banks to be lean