Scott610

iTrader: (3)

Hey guys I got a cel issue saying that I'm running too lean in bank one and two and car runs like something is holding it back try clearing it and it came back the next day I have sikky headers and Borla exhaust with no cats please help thanks and calling je tomorrow morning

JDMV8

iTrader: (6)

It's your O2 sims: they're either bad or you were really pushing your car.
If you were beating on it, unplug the battery and the cel will go away.
If not, new sims needed!

Scott610

iTrader: (3)

Yea cleared it came back I'll try to get the simulater looked at do u know where they put the simulater ? I think it was to the right side of the engine near the fuse box I'm guessing

minator

AF is read by the AF sensors not O2. Since both banks are reading lean, may be something upstream. MAF? Vacuum leak?

Scott610

iTrader: (3)

Hopefully not a leak I took to the dealer and dumbass mechanics told me I need to get tune so idk what it is now other members had this problem before just want to here answers from them too just to make up my mind on what I should do but thanks for the help I'll get someone to look over everything this **** is a headache lol

MWIS350

Change the MAF sensor. If still have issue. Then both front O2 sensor.

Scott610

iTrader: (3)

Going to do a smoke check to see if any vaccum leaks keep you guys posted

Meanstreak

Do you have any intake mods or AOS?

Scott610

iTrader: (3)

Yes I do the rr racing intake and rr racing aos

Scott610

iTrader: (3)

Just changed the maf sensor wasted my money on that check engine light came right back not anyone's fault should did smoke test but the machine is at another dealership so I'll have to wait till we ( where I work Audi ) get it back so instead of waiting I just set an appointment with a know shop around where I live so wish me luck and hopefully I don't waste more money

I8ABMR

By far most of the CELs threads on this forum are header related. I would look at the wiring ( can melt ) on yours as well as the O2 sims . There are a ton of threads on this topic .

JDMV8

iTrader: (6)

bro, it's the o2 sims in the headers. get two new sims put in.
I'm not sure why somebody mentioned MAF when your code is for the sims.

Scott610

iTrader: (3)

Is sim referring to the simulator or the 02 sensor ?

JDMV8

iTrader: (6)

when JE installed your headers they removed the O2 sensors and replaced them with O2 sims.

Scott610

iTrader: (3)

No the 02 sensors are still there because I had to buy two new ones when I was there cuz they said they can't take the old ones out to put it in the sikky headers the 02 simulater was installed in the engine near the fuse box it was in the box right next to it . I check the simulater couple days ago and it look fine and called sikky and spoke to Justin and he told me the codes that it's throwing has nothing to do with the headers so I'm stuck trying to figure it out myself so taking it to a shop