Had P0302 code, changed plugs & wires, now have P2097, how, why?

Question

Chrysler 2006 Town and Country, ran well until last Sunday, noted spuddering. Check engine light came on, had it checked, P0302, Misfire cylinder 2. I changed plugs & wires, still spuddering. CEL came back on, had it re-checked and now it came up with P2097. Car still feels like its misfiring, don't know where to look now.

Answer 1

P2097 Downstream fuel system rich bank 1 sensor 2

Downstream sensor are catalytic monitors, This is a mechanical condition that can cause this code to appear,Testing of the suspected cylinder with a leakdown or a compression test will verify the problem.