Having exhaust codes come up on the CEL. Tried new O2 sensors but that didnt fix it. I wanted to take the EGR valve off and check it to see if it is clogged. I dont think it is since my idle is still fine. Im also finding random forums showing that this particular car does NOT have an EGR valve...Just looking for some guidance before I jump on buying a new Catalytic Converter and/or more O2 sensors.