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View Full Version : Engine code P0171 on a 3400 V6


Kilroy
01-28-2010, 10:34 PM
Well, the Alero (3400 V6) threw a "P0171" Engine code. If I remember right, it is "bank 1 running lean". Well, I went under the hood to check it out, and guess what I discovered?

Now, if anyone hasn't figured it out, I just want to see who will be the first to guess the correct problem I had.

:scpimp:

guiguilandry
01-29-2010, 12:32 AM
LIMG ...
Exhaust leak of some sort...
Manifold cracked or gasket burnt ?????

Alero4life
01-29-2010, 12:36 AM
running lean

rustyballs_69
01-29-2010, 12:51 PM
Vacuum leak?

Nate's Alero
01-29-2010, 12:58 PM
unplugged MAF

cherrington17
01-29-2010, 01:28 PM
when mine did that... the MAF went bad. Replaced it and it stopped.

so... i'm gonna go with unplugged maf OR upstream O2 wires got cut somehow.

Kilroy
01-29-2010, 02:45 PM
I guess "vacuum leak" was the closest. What was wrong, was the hose on the PCV valve popped off. A while ago I had troubles because the PCV elbow was cracked, and leaking. I got a universal one, and it worked good, untill a while ago. Seems the elbow was made of a silicone rubber, and when it got warm, softened up enough to pop off of the PCV valve. So, I just got a clamp, and now it don't pop off of the PCV valve. (Fits snug on the line running towards the windshield thank goodness.)

cherrington17
01-29-2010, 02:52 PM
Sweet! i was right.

what do i win???

Kilroy
01-29-2010, 02:57 PM
Sweet! i was right.

what do i win???

How are you right, it had nothing to do with the MAF, OR the O2 sensor??????

cherrington17
01-29-2010, 03:13 PM
exactly. what'd i win?

Kilroy
01-29-2010, 03:20 PM
A shiny orange street cone for you to wear as a hat. That, and a chair in the corner of the room.:lol::yahoo: :lol:

cherrington17
01-29-2010, 03:31 PM
:yahoo:

Kilroy
01-29-2010, 03:34 PM
Who the heck knew a CAR forum would cheer me up today? :)

Nate's Alero
01-29-2010, 03:56 PM
lul....