p0171 system too lean - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 02-26-2012, 07:50 PM
cherndoyn cherndoyn is offline
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2006 Chevy TrailBlazer LS
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p0171 system too lean

What does the error code p0171 system too lean mean? How do we fix it? Its on a 2006 trailblazer
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  #2  
Old 02-27-2012, 07:26 PM
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shorty shorty is offline
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Quote:
Originally Posted by cherndoyn View Post
What does the error code p0171 system too lean mean? How do we fix it? Its on a 2006 trailblazer
could be bad gas, or a fuel injector
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  #3  
Old 02-27-2012, 07:28 PM
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Quote:
Originally Posted by cherndoyn View Post
What does the error code p0171 system too lean mean? How do we fix it? Its on a 2006 trailblazer
a dirty MAF , loose intake manifold bolts , or a bad o2 sensor
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  #4  
Old 02-27-2012, 08:34 PM
tarheel34 tarheel34 is offline
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I've got the same code popping up on my 2006 TB EXT. I was leaning towards an O2 sensor, but I'm going to try cleaning the MAF sensor and throttle body this weekend and see if that helps anything before I start throwing parts at it.
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  #5  
Old 02-27-2012, 10:13 PM
cherndoyn cherndoyn is offline
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It happens on almost every tank of gas around three quarters of a tank stays on for around 60 miles or so and usually when I'm sitting somewhere idling. I have tried getting gas somewhere else too.
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  #6  
Old 07-25-2012, 07:38 PM
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Jmanos26 Jmanos26 is offline
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I'm getting the same code...smh....I have replaced the o2 sensor, cleaned the TB, replaced the intake manifold gaskets did fuel injection cleaning and replaced the spark plugs and one coil.... Don't know what else to do....any advice is greatly appreciated.
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  #7  
Old 07-25-2012, 10:02 PM
cherndoyn cherndoyn is offline
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I put in some sea foam and quit getting gas at Murphy's and it hasn't come back on since.
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  #8  
Old 07-25-2012, 10:40 PM
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Thanks for the info...i'm going to try it tomorrow and see...
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  #9  
Old 10-18-2012, 11:44 PM
TrailBLT TrailBLT is offline
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2006 Chevy TrailBlazer LT
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P0171

Ive had this code pop up a few times but i have a scanner and turn it off by erasing the code and it wont turn on for a while but since the first time on acceleration there is a hissing noise kind of like if there was a hose unplugged or something but checked everything and it all looks good i did clean the throttle body and the mass air flow sensor and the hissing is still there its getting anoying not sure what to do next can someone give me some ideas or has this happened to anyone?



2006 Trailblazer LT 4.2
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  #10  
Old 01-05-2013, 04:25 AM
Goldtrailblazer Goldtrailblazer is offline
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Any answers please I have the same problem on mine, I replaced o2 sensors front and back, I also replaced the maf sensor, I checked for any leaks, and everything seems to look normal. I do not know what to do I am really tired of this car since I bought the car I have been having this problem. Can you repeat what did you do with the foam and how did you do it please...
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