P2A00 2006 Nissan sentra se-R spec V 2.5L

Question

I need to know what to look.for. After i put in a new cat. I thought i was going to get a better gas mileage. It never happened.

Answer 1

Hi there,

The code is for the front A/F sensor. You need a scan tool that can read the live data Typically the front A/F (O2) is the problem.