CEL, Code P0171
Thread Starter
Race Director
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CEL, Code P0171
Friend of mine just installed a new intake manifold on his 2005 C6 and after two weeks of driving, it has thrown a P0171 (bank 1 lean) code. I said probable intake gasket failure, and it's sucking a little additional air, resulting in the lean condition. He says, "No way." He installed it correctly. Before we go tearing the manifold off, I thought I'd ask anyone here if they may have had a similar problem or code, and what remedy fixed it. Thanks.
Drifting
Joined: Jul 2005
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From: az
Friend of mine just installed a new intake manifold on his 2005 C6 and after two weeks of driving, it has thrown a P0171 (bank 1 lean) code. I said probable intake gasket failure, and it's sucking a little additional air, resulting in the lean condition. He says, "No way." He installed it correctly. Before we go tearing the manifold off, I thought I'd ask anyone here if they may have had a similar problem or code, and what remedy fixed it. Thanks.
i am with you eurorod.
Safety Car
Joined: Jan 2007
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From: Kuwait
Friend of mine just installed a new intake manifold on his 2005 C6 and after two weeks of driving, it has thrown a P0171 (bank 1 lean) code. I said probable intake gasket failure, and it's sucking a little additional air, resulting in the lean condition. He says, "No way." He installed it correctly. Before we go tearing the manifold off, I thought I'd ask anyone here if they may have had a similar problem or code, and what remedy fixed it. Thanks.
bank 1 lean and bank 2 lean
Race Director
Joined: Aug 2000
Posts: 10,649
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From: Central Florida
On LS1 and LS6 motors with a CAI installed, occasional P0171 and P0174 codes under very light throttle are reported routinely.
The advice is:
Check all the connections in the airpath for tightness. Clear the code(s) and go for a ride. It's very rare for the code to recur on the test drive.
I used to get one or the other lean code a couple times a year on my 2002Z with CAI, always a minimal throttle when descending a long grades once the speed had dropped to 30-35 in 5th.
It never reflected a true lean condition of concern.
Don't know about a CAI on the LS2/7. Mine is stock.
Ranger
The advice is:
Check all the connections in the airpath for tightness. Clear the code(s) and go for a ride. It's very rare for the code to recur on the test drive.
I used to get one or the other lean code a couple times a year on my 2002Z with CAI, always a minimal throttle when descending a long grades once the speed had dropped to 30-35 in 5th.
It never reflected a true lean condition of concern.
Don't know about a CAI on the LS2/7. Mine is stock.
Ranger
Safety Car
Joined: Jan 2007
Posts: 4,332
Likes: 0
From: Kuwait
On LS1 and LS6 motors with a CAI installed, occasional P0171 and P0174 codes under very light throttle are reported routinely.
The advice is:
Check all the connections in the airpath for tightness. Clear the code(s) and go for a ride. It's very rare for the code to recur on the test drive.
I used to get one or the other lean code a couple times a year on my 2002Z with CAI, always a minimal throttle when descending a long grades once the speed had dropped to 30-35 in 5th.
It never reflected a true lean condition of concern.
Don't know about a CAI on the LS2/7. Mine is stock.
Ranger
The advice is:
Check all the connections in the airpath for tightness. Clear the code(s) and go for a ride. It's very rare for the code to recur on the test drive.
I used to get one or the other lean code a couple times a year on my 2002Z with CAI, always a minimal throttle when descending a long grades once the speed had dropped to 30-35 in 5th.
It never reflected a true lean condition of concern.
Don't know about a CAI on the LS2/7. Mine is stock.
Ranger
"P0016" Crank Shaft Position - CamShaft Position Correlation - Bank 1
what is that? I also got "UNKNOWN" code!
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Race Director
Joined: Aug 2000
Posts: 10,649
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From: Central Florida
And
good advice and an offer to send you the technical explanation:
I have All Data program for my shop. I checked this code and here's the description "If ECM detects that the timing between the crankshaft and the camshaft is incorrect, DTC P0016 sets."
I cannot copy and paste the whole test procedure because ALL Data program data is protected. I CAN print this out and fax it to you if you want. I'm closing in 15 minutes right now, I will be at my shop tomorrow also.
Kenny
I cannot copy and paste the whole test procedure because ALL Data program data is protected. I CAN print this out and fax it to you if you want. I'm closing in 15 minutes right now, I will be at my shop tomorrow also.
Kenny
Ranger
Safety Car
Joined: Jan 2007
Posts: 4,332
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From: Kuwait
That code isn't in the 2006 service manual I have. A quick search turned up some your request for help here: http://forums.corvetteforum.com/show....php?t=1731738
And
good advice and an offer to send you the technical explanation:
Did you follow-up with Kenny? if you lack access to a fax machine let me know by PM. Perhaps I serve as an intermediary.
Ranger
And
good advice and an offer to send you the technical explanation:
Did you follow-up with Kenny? if you lack access to a fax machine let me know by PM. Perhaps I serve as an intermediary.
Ranger
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 32
From: Central Florida
I'd suggest another post to your original thread.
Ranger
Last edited by Ranger; Jun 21, 2007 at 06:30 PM.
