2003 Lincoln Aviator Q&A

2003 Lincoln Aviator Question: Replaced cat cnvrtr, O2 sensor. Now show P0138,P2270. ANother sensor? Which one

Previous codes prior to replacement of cat converter and sensor were P0132, P0301, P0316, P2195. Had previous intake manifold gasket, vent hose, spark plugs in Sept -
Answer 1
check online -