You are right, the cats monitored by the sensors are the upstream ones. The afterburners are just to reduce unburned hydrocarbons even more.Da_Q-ban_1 wrote:Thanks your checking into this. I'm curious, which model of that cheap scanner specifically did you buy? For 13-15 bucks that's a steal, even if it provides a little more data than regular scan tool.
Mine also has a bunch of codes... I just erased them all yesterday. We'll see which ones come back. I too may need a new cat.Thupertrooper wrote:Just tried the lite version and everything worked fine. My Pathfinder has alot of issues. I need a new cat so I was able to see the o2 sensor voltages and confirm bad cat
I would really want something to read abs codes as its more sensitive and my light is always on.
Yesterday as I waited for mechanic to come back from lunch I popped into a muffler shop in Mesa. He lifted the pathy, scanned her and confirmed I need new cats.. P0430 (not sure what others.. when I scanned it I only saw the one) and proceeded to quote me $500 for replacing both cats. But here's the interesting part, he said I needed the back ones (closer to the exhaust), which he called "backburners/burn-backs" or something along those lines.
Aren't these what's known as the downstream cats?
And if so, shouldn't the ones being replaced be the upstream cats (closer to manifold)?
Or am I incorrect, and does the code P0430 refer to the bank 2 cat, which IS the downstream cat on the driver side...?