I just installed a injen cold air intake on my 2008 tib gt limited and after about a day the check engine light came on.Two error codes keep coming up PO171 and PO174 The computer recognized a rich or lean condition on one engine bank only.IWe even cleaned the sensor thinking their my be some dirt on it and reset the codes,but the check engine light returns within a day.The car is running great,with the exception of the light coming back on.

 

Those codes are lean on both banks. I'm guessing you have a vacuum leak.



V6? And is that MAF or MAP based?



Recheck your install. There is probably a vacuum hose off or loose coupler somewhere.