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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
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Old 03-31-2012, 09:00 PM
CF Beginner
Join Date: Mar 2012
Posts: 1
Angry P0171 system too lean bank 1

I got this truck like a month ago. After I got it the evap code was on I took it in to the shop it was replaced but it wasn't plugged in so they hooked it up for me its still got a hard start. It takes 3 turns to get it to fire. I've replaced the fuel pressure regulator and plugs and wires and nothin. So now I got p0171 system too lean bank 1. I've clean the maf sensor and 3I days later it came back on

Anyone have this problem?
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Old 04-01-2012, 09:19 AM
nkh34's Avatar
CF Active Member
Join Date: Nov 2011
Location: Idaho
Posts: 177

it might need a new sensor also you want to really look at the manifold if its cracked anywhere it will throw this code all day if its not really effecting anything you might also look at the 02 sensor it could just be going out
97 silverado k1500 5.7L 350 vortec,
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Old 04-01-2012, 09:29 AM
in2pro's Avatar
2007 Chevrolet Tahoe
Join Date: Apr 2008
Location: Austin, Texas
Posts: 6,674

debo Welcome to the forum...

What year and engine do you have?
It might be worth checking the fuel pressure as well.... and as nkh34 suggested check for any vacuum leaks...
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Old 01-06-2015, 11:00 PM
CF Beginner
Join Date: Jan 2015
Posts: 1

Need help have a p0171 code comes on only at night I clear the code and drive all day and Nothing it only comes on at night checked intake for leaks mass air clean new plugs wires cap rotor. What else can I do to make it go off
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Old 01-06-2015, 11:00 PM

1, 2008, bank, chevy, code, k1500, lean, p0171, picture, po171, show, silverado, system, systen, tracker

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