Sounds like an intake manifold gasket OR a throttle position sensor, I've seen both throw the codes you are talking about. Usually an intake manifold leak will cause some issues that do not go away. Spray some engine cleaner around the intake manifold gasket, it made a loud sucking noise when I hit the leak on my 2001 Rodeo.

Does it run smooth after you clear the CEL? No hiccups from the engine? The TPS connected to the accelerator pedal could be the culprit, it was on my daughter's Rodeo. Any pedal assembly from a 2000-2004 should work. I replaced my daughter's 2000 Rodeo's with one from a 2003 Axiom, no problems since.