Mazda Repair: 2001 Mazda Millenia S losing power, mazda millenia s, mazda millenia

Question
2001 Mazda Millenia S (supercharged)
First off thank you very much for your time. This is a probably a tough one but I would appreciate any help at all.
Me and my father in Law have been trying to figure out what is going on with the Mazda he bought a while back. Seemed to be running fine for the first 2 months or so then on one HOT day it lost a lot of power and he stated it felt like it wasn't running on all cylenders. He had to have it towed. The next day it started up fine and was running great. Now it does not respond to acceleration as it should. We hooked up a Snap On diagnosis code reader and got the following codes P0421, p1250, p0173. Any Ideas?

Answer
PO173 is fuel trim malfunction bank no2
PO421 is warm-up catalyst efficiency below threshold bank no1
no listing for P1250

there emission codes and can be caused by a number of factors. even using low grade gas can cause the car to act the way it is. start dy using the recommended gas and do a tune-up. you may have clogged injectors bad plugs vaccum leak exhause/intake leak. or the O2 sensor needs to be replaced