The Rover-Landers of BC

Hi,

I've changed oxygen sensors and maf sensor. After a few weeks the engine light came on again, and I when I scanned it with my OBDLink mx scan tool I got this:

stored trouble code: P1175
pending trouble codes: PO171 system too lean bank 1

Might this be a vacuum link?

Thanks,

This did turn out to be vacuum leak.