2004 nissan pathfinder armada le

Question

I have a 2004 Nissan Pathfinder Armada and my check engine light came on. The codes that showed were P1168, P1051, P0420 where do I begin. Also I do no that I have a exhaust leak, could that possibly throw the codes?
Where is the locations of these

Answer 1

Hi there

P1168 and P1051 are related. P1051 is for the bank 2 O2 sensor, sensor 1. This is mounted in the exhaust manifold on bank 2. This should not be causing the catalytic converter code on bank 1. The P0420 could be the result of the exhaust leak, a bad rear O2 sensor on bank 1 or the converter itself could be the issue. Most commonly the converter is the problem.

Bank 1 is the passenger side of the truck.