Code po174/po171

[web7433]

On the way home from work my idiot light came on. So I stopped in at autozone to get a half ass answer. Well they told me po174/po171. It could be alot of things. I do have a CAI so it could be the MAF sensor. Should I bring it to a dealership to have them check it out? Any clues how to diagnose the problem.. It seems to run ok.. I did notice the idle went down for a second. I have been reading on forums about Intake gaskets but thats hard to beleive. Please write back if you have any suggestions.

[CHEVROLADE]

SAME CODES IM THROWING,

Po171-fuel Trim Bank Condition

Explanation-the Pcm Uses The Oxygen Sensor To Calculate The A/f Ratio Of The Engine.the Computer Has Recognized A Rich Or Lean Condition On One Engine Bank Only.

Po174-fuel Trim Bank 2 Condition

Explanation-the Ecm Has Detected A Rich Or Lean A/f Ratio Condition On Bank 2.

[GasGuzzler]

04's rarely have intake gasket vacuum leaks although it is common on the older versions.

You need to check fuel pressure and check for vacuum leaks 1st.

[web7433]

I started it up this morning and the light is off. Its a little warmer today so I don't know if that was the issue or what. I'm not going to worry about it till it comes back on again. I hate idiot lights..

[AFSP1211]

Mine's throwin the same codes. mainly when it's cold out.

[C-WAY]

My truck throws the 171 code sometimes then shuts off, Im at the point now where I could care flippin less ...well kinda haha

So either its bad 02 sensor or a vac leak? How hard is it to check for vac leaks?

[GasGuzzler]

It's not. Use a scanner to watch STFT and spray alcohol based foaming glass cleaner on hoses, fittings, and gaskets and watch for a rich condition.

BTW.....PLEASE!!!! For the love of God and humanity nothing has ever or will ever THROW codes.