P0420 Code and New Cat
2008 Sentra. I have a persistent P0420 code that comes back when the system check is complete. I replaced the upstream O2 sensor. Apparently i am going to have to buy a new cc. There are no apparent performance issues. The car starts and runs very well. No perceivable loss of power etc. I found a Walker and Pacesetter on Rockauto. Pacesetter is cheaper. Which would be better?
Thanks.
Last edited by tvengineer; 05-21-2019 at 11:25 AM.
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