Does anyone know about this code?
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 752
Likes: 0
From: Lebanon CT.
Does anyone know about this code?
I did some mods last winter. Had a tune done by COW (mail order) Car seemed to perform well. I went to Limerock this past Saturday and on the way to the track I noticed the check engine light on. Got home and hooked up the code reader and it showed this:PO171 fuel system lean bank 1 , PO174 fuel system lean bank 2. Any ideas?
Last edited by sea six; Jul 8, 2007 at 05:53 PM.
Le Mans Master
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Did your mods include headers and or a CAI? As far as I know both those codes are common on cars with headers and or CAI's.
As you can tell they do not affect drivability but they are a pain never the less. You can clear them but expect them to pop up again. Last week Chuck tuned my car and while on that subject he turned off the tests that ultimately throw those codes.
As you can tell they do not affect drivability but they are a pain never the less. You can clear them but expect them to pop up again. Last week Chuck tuned my car and while on that subject he turned off the tests that ultimately throw those codes.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
As for why you get a code after some time has passed is that weather conditions affect breathing for a motor. A leak in the intake tract or a losse bolt on the intake manifold would also cause higher LTFT's. Take it back and have him scan it.
Safety Car
Joined: Feb 2005
Posts: 3,557
Likes: 1
From: LongIsland,NY............
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 752
Likes: 0
From: Lebanon CT.
You didnt say if the mods were in place before or after the tune. Those mods directly affect that code and should be in place before a tune. Both of your mods affect long term fuel trends and would show a code if you went +24% positive on them. It is a simple adjustment and Im sure Chuck can do ti quickly.
As for why you get a code after some time has passed is that weather conditions affect breathing for a motor. A leak in the intake tract or a losse bolt on the intake manifold would also cause higher LTFT's. Take it back and have him scan it.
As for why you get a code after some time has passed is that weather conditions affect breathing for a motor. A leak in the intake tract or a losse bolt on the intake manifold would also cause higher LTFT's. Take it back and have him scan it.
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