Code p0420, does that mean a/f or o2 on bank 1 for a murano 2006 rhd

Question

Recently replaced broken front exh manifold, refitted a/f sensor.

Answer 1

HI there,

P0420 is for the catalytic converter on bank 1. Bank 1 is the side of the engine closest to the firewall. If it's the O2 sensor causing the code, then it's the one after the converter on that bank.