2000 Nissan Altima with engine codes P0325 and P0420, what is the meaning of the codes?

Question

2000 Nissan Altima 2.4L with engine codes P0325 and P0420, what is the meaning of the codes?

Answer 1

You must replace the catalytic converter for the P0420 and the knock sensor for the P0325.

P0325 NISSAN - Knock Sensor Circuit Malfunction
Read more: https://www.autocodes.com/p0325_nissan.html

P0420 NISSAN - Catalyst System Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0420_nissan.html