Okay I need some help here. I checked my codes using the 'paperclip' method and I came up with 172, 332, and 337. I looked these up on the Fault Code Definitions for EEC-IV System page and it just didn't make much sense to me.
172 - Heated oxygen sensor fault/lean bank #1
332 - Insufficient EGR flow detected
337 - EGR sensor circuit above maximum voltage
To me it seems like all of these are connected. Like it might only be one thing. Like one of the oxygen sensors is bad, or the EGR valve is clogged, or it's just the EGR sensor. I'm not sure. Any advice would be appreciated. Thanks again.