Error Code, 1989 Pontiac Grand Prix

It's a 3.1l Multiport, what is error code 33 and 44? ..does anyone know that?

Code 33 indicates to check the MAP sensor and replace and code 44 indicates a lean exhaust condition check for vacuum leaks and intake manifold gasket.

both codes could be tripped simultaneously if there is a vacuum leak in the line to the map sensor.