CEL P0174 & P0171

[merc123]

I've recently pulled these two codes

P0174 - Bank 2 too lean
P0171 - Bank 1 too lean

I recently installed a CAI and I'm going to check for any vaccum hoses that may have come off. In addition, I know I have an exhaust leak on my passenger side pipe between my O/R H and the mufflers.

Is it possible my MIL elims could have went bad or just my front O2 sensors going out?

Other than the exhaust leak, O2 sensors or vaccum leak is there anything else I should check while I'm there?

 

[sgarlic]

O2 sensors don't just go out suddenly, unless you mess with the wiring, cause damage to the sensors themselves, or do something like run leaded fuel.

I would clean the MAF first.. and if that doesn't solve it, fix your exhaust leaks.

 

[merc123]

I'm thinking my MIL elims may have gotten water in them and friend them. It was raining pretty heavy and the streets flooded where I was at.

 

[Mike97gt]

Any vacumm leak can cause these codes. A exhaust leak on both exhaust manifolds ( unlikely) can cause this. or a bad maf

Since you just did a CAI I would start by looking there.

BTW MIL elims have nothing to do with these codes. These are codes related to the fuel table correction, and the rear 02's have nothing to do with that

 

[d98gt]

There has been 3 posts about the same codes in 2 days I threw the same codes the other day and my little thread shows what my problem was. http://forums.stangnet.com/showthread.php?t=648725

I was lucky enough to have a 51 cent fix

 

[merc123]

My CAI pipe had a 1/8" space between it and the TB at the top. I reconnected it and retightened the clamps. If it comes off again, I guess I'll need new clamps

So far no more CEL.

 

[Mike97gt]

My CAI pipe had a 1/8" space between it and the TB at the top. I reconnected it and retightened the clamps. If it comes off again, I guess I'll need new clamps

So far no more CEL.

that would cause it. Glad you found it.

 

[d98gt]

Gotta love the free/cheap repairs

 

[merc123]

They are the best! I just dropped $4500 into my racing engine...shoulda just went 383 blown stroker too bad jail doesn't sound too good to me.