about 2001 nissan sentra GXE catalytic converter?

Question

a nissan dealer checked my car and told me the catalytic converter need to replace. I want to know how many catalytic converter the car has? how to identify which one is abnormal?

Answer 1

Three actually! Two converters made onto each other under the exhaust manifold and one under the car because sentra is ultra low emissions it also has four O2 sensors those four connectors on the manifold . The job takes 3.0 hours and I personally know one or both of the bottom O2 sensors will ge stuck and will not come out. I always have those two O0 sensors in stock before attempting a cat replacement on a sentra. The P0430 is bank 2 and P0420 is bank 1 either way the front converter comes as both.

Answer 2

what's the meaning of "The P0430 is bank 2 and P0420 is bank 1? my nissan shows code P0430 and wondered which catalytic converter will need to be replaced.

Answer 3

DO NOT LET THEM REPLACE THE CATALYTIC ! if the car has under 100,000 miles it is warrantied by the manufacturer. the majority of check engine lights are a bad sensor which is infinitely less $$$. take it to a reputable garage and have the engine properly scanned. cast $60-100.00 and worth it.