P0420 Nissan -

Question

P0420/p0420 nissan pathfinder 2005 trouble codes.

Answer 1

Hi there,

This code usually means you will need to replace the bank 1 catalytic converter.P0420 means the bank 1 catalyst is working below threshold. It is possible there could be an issue with the rear O2 sensor or if you have a poorly running engine it can cause this code.