These codes are lean codes. A lot of the times it is just a bad mass air flow sensor causing these codes. It is always a good idea to clean the keep alive memory in the computer when replacing the mass air flow sensor otherwise these codes may come back. This may be your entire problem. The only other thing would be a big fat vacuum or air leak. Check along the intake manifold gaskets and vacuum hoses and lines ot be sure that none of them are leaking. ALso, check the air snorkel after the mass air flow sensor for cracks and ripes.
Hi, I've replaced the mass air flow sensor and had the computer reset. I've also checked for intake gasket leaks. Vacuum hoses all seem fine. Any other thoughts?