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Pre-cat or header options? - code 0420
I doubt thereís any correlation between the two, but I changed the oil in my 04 Altima 2.5 on Sunday, then yesterday, the car ran fine, but I went to start it back up later that night and had a SES light on. The code I got was a P0420 and looking around, it seems that the pre-catalytic converter is having issues, so, my question is this; whatís a good option for replacing this? I want as little trouble with fitment as possible, donít care about hp gains, etc, just want it to run right for as little as I can spend and still get good quality.
I donít have to thankfully worry about emissions testing here, so if headers are a better options, thatís fine, though Iím honestly a little iffy on fooling the carís computer with a fake O2 sensor reading.