HELP with malfunction codes

[LosOjos]

Last weekend I performed the spring cleaning procedure from gnttype.org, installed a big-mouth cold air intake, and a tps enhancer. The first time I hit wot my service engine soon light came on. I installed a scanmaster, which told me I had a malfunction code of 23, my MAT sensor. I picked up a new MAT sensor from the local auto parts store, which made my Service engine soon light go out, but I'm still getting a code 23, and now also codes 32 (EGR components) and 44 (O2 sensor). Should I replace my EGR valve and O2 sensor? And why am I still getting a code 23?

 

[Tow Man]

Did you clear the ECM by unpluging the orange wire at the battery? The ECM will store any code that was set.

Try clearing the ECM and see if any codes reoccur.