HI there
This code is for a faulty catalytic converter on bank 2. If you are looking to replace the rear O2 sensor, it is mounted AFTER the converter on the driver side of the engine. There are several possible causes for this code. Here is a listing of them
P0430 NISSAN - Catalyst System Efficiency Below Threshold Bank 2 Read more: https://www.autocodes.com/p0430_nissan.html
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