P0171 code help (I know I know) - Chevy Cobalt SS Forum : Chevrolet Cobalt SS Forums
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post #1 of 7 (permalink) Old 02-20-2006, 09:40 PM Thread Starter
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P0171 code help (I know I know)

I know you've guys have heard this code mentioned several times but I just would like a few questions answered.

1. How long does an engine have to be in a "lean" state to throw the code?

2. No engine damage is being done?

3. Chances are the GM stage kits will remedy the problem right?

I've searched forums on both cobalt sites and couldn't find the answers...

2005 Victory Red Cobalt SS Supercharged
GM Performance Stage 2 kit with 2.9" Pulley
K&N Typhoon Cold Air Intake
Corsa Touring Cat-Back Exhaust System
ZEX Plugs
Aeroforce Interceptor SS Edition Gauge
AEM UEGO Wideband A/F Gauge
Custom Engine Covers
DC Sports Strut Tower Bar
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post #2 of 7 (permalink) Old 02-21-2006, 09:29 AM
 
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look at the redlineforums.com , i Think they answer it there, at l;east it's always being talked about.
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post #3 of 7 (permalink) Old 02-21-2006, 08:39 PM
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Quote:
Originally Posted by dervin3
I know you've guys have heard this code mentioned several times but I just would like a few questions answered.

1. How long does an engine have to be in a "lean" state to throw the code?

2. No engine damage is being done?

3. Chances are the GM stage kits will remedy the problem right?

I've searched forums on both cobalt sites and couldn't find the answers...
1 : As per the GM service manual, the P0171 code sets on when the long term fuel trims weighted value are at least 20% more than the calibrated value for 2 minutes or more.

2 : Mostly no on a barely stock car, but if you install several mods that increase the air flow (intake, exhaust, aider, pulley) chances are that your air fuel ratio will be too lean and that you will be missing fuel.

3 : Maybe, maybe not ! No one can be sure until the kits are out.
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post #4 of 7 (permalink) Old 02-21-2006, 09:09 PM
 
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I know I sound like a broken record sometimes, but your lean code is most likely caused by a mis-aligned MAF from your CAI install. If that is the case, the stage kits will have no impact. Make sure your MAF is square to the air flow at the mounting point in your CAI. This may get rid of your cel. If you truely are running lean, engine damage could occur. You might want to install a A/F gauge on the car to continuously monitor the air fuel ratio.
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post #5 of 7 (permalink) Old 02-21-2006, 09:42 PM Thread Starter
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I only have gotten the code twice in the nearly 7000 miles I've put on the intake...

2005 Victory Red Cobalt SS Supercharged
GM Performance Stage 2 kit with 2.9" Pulley
K&N Typhoon Cold Air Intake
Corsa Touring Cat-Back Exhaust System
ZEX Plugs
Aeroforce Interceptor SS Edition Gauge
AEM UEGO Wideband A/F Gauge
Custom Engine Covers
DC Sports Strut Tower Bar
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post #6 of 7 (permalink) Old 02-22-2006, 07:34 PM
 
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Mine only comes on on days that are very cold, <32 degrees
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post #7 of 7 (permalink) Old 01-22-2015, 05:08 PM
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Itís really great posts.


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Last edited by Prikfireyw; 03-05-2015 at 06:22 AM.
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