back story - bank 2 cat took a shit, probably due to getting the good old ecoboost shudder a couple times back in the day. Couldn't find an OE cat or even a date on when I could get one. I put SPD Performance catted downpipes on it. I replaced all 4 sensors while I was in there.
Only other mods are a CVF intercooler and tuned.
Ever since I've been getting that P2096 which is a bank 1 lean code, which appears to come from the cat monitor sensor, not the front wideband. If I'm cruising on the interstate I might go hours between lights but in town it's usually less than 20 miles.
Tuner's reply is basically you have aftermarket downpipes with aftermarket cats, get ****ed. Searching the web seems other people's tuners (post EPA BS) made tune adjustments and the light stopped. I know they aren't supposed to mess with anything that would effect the cat below threshold CEL from working but to me a lean code is a lean code and seems that bank needs more fuel (which, with a higher flow cat, doesn't seem too wild).
I will say I put nonfoulers on there to try and avoid a cat below threshold light, the little crush seals on them don't seem to be very good and did not evenly squish. I took the spacers out last night to see what happens. I made it to the store last night and work today without a light, see what happens from there.
If nothing else I'd just like to better understand why this is caused by an inefficient cat and isn't just a fueling issue
Only other mods are a CVF intercooler and tuned.
Ever since I've been getting that P2096 which is a bank 1 lean code, which appears to come from the cat monitor sensor, not the front wideband. If I'm cruising on the interstate I might go hours between lights but in town it's usually less than 20 miles.
Tuner's reply is basically you have aftermarket downpipes with aftermarket cats, get ****ed. Searching the web seems other people's tuners (post EPA BS) made tune adjustments and the light stopped. I know they aren't supposed to mess with anything that would effect the cat below threshold CEL from working but to me a lean code is a lean code and seems that bank needs more fuel (which, with a higher flow cat, doesn't seem too wild).
I will say I put nonfoulers on there to try and avoid a cat below threshold light, the little crush seals on them don't seem to be very good and did not evenly squish. I took the spacers out last night to see what happens. I made it to the store last night and work today without a light, see what happens from there.
If nothing else I'd just like to better understand why this is caused by an inefficient cat and isn't just a fueling issue