Sameer89

The last few weeks, post exhaust installation, my 2010 ISF has been throwing the PO171 and PO174 check engine lights. Both of these codes are registering a 'lean condition' for Bank 1 and Bank 2. Has anyone encountered a similar situation? I am at a loss, as I've covered everything top to bottom and cannot identify any leaks. I was speaking to a friend of mine with an ISF, and he stated that these codes may have triggered from me reusing the header flange gaskets when I installed the new exhaust system.

Appreciate any insight as to where to further diagnose before I take my F to the dealership (in warranty still).

Thanks in advance for any advice on this situation. I would love to get this fixed prior to my HPDE on December 10th.

Regards,
Sameer

Joker4096

iTrader: (2)

Check for vacuum leaks on the intake side.

nicklausw

What mods do you have?

Sameer89

TOM's air filter, RR Racing carbon intake elbow, AOS & catback exhaust system.

nicklausw

Triple check the AOS. Lots of people have had a leak on those lines causing your CELs.