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Code P0171 ON A TRAILBLAZER - 2004 Chevrolet TrailBlazer

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First thing to do is to clean the throttle body, this code is indicating a lean condition. The throttle body needs to be cleaned on the front and back sides, this means taking it off the engine. During the cleanng, the battery should be disconnected to reset the computer.

Posted on Nov 14, 2012

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P0171 and p0172 codes


the following links explain the codes and practical and a procedural way of doing so as to not through parts at problem
http://www.obd-codes.com/p0171 http://www.obd-codes.com/p0172

Jul 07, 2016 | 2004 Chevrolet Chevrolet TrailBlazer LS

1 Answer

Engine code P0171


p0171 is a lean code, check mass air, fuel pressure, vacuum leaks - check intake manifold bolts, make sure all of them are tight.

Mar 01, 2014 | 2008 Chevrolet Trailblazer

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P0171 code after installing car amp


uninstall the amp as you plugged into a circuit that is incorrect and is affecting the power supply to ---fuel pump---AIR system---MAF/VAF sensor--

Dec 26, 2013 | 2008 Chevrolet Trailblazer

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08 chevy trailblazer


P0171 is a lean bank one code. It is usually always a vacuum leak and is usually not an O2 sensor or a MAF sensor. The first step shoul have been to check for vacuum leaks.

What engine do you have?

Jan 08, 2012 | Chevrolet Cars & Trucks

1 Answer

Codigo p0171 mezcla de combustible pobre: se acelera a 1000 rpm trailblazer ltz, 2005, 6 cilindros, 4.2 l. Gracias


Losiento, mi espanol es no perfecto.

LA MAYORIA de LOS tiempo que p0171 son un sensor malo de MAF, limpian o lo reemplazan. Hay una pareja m?s cosas que pueden ser hechas, pero en total,' no caro fijar. Son situ? cerca de Sacramento, yo le puedo ayudar.

Feb 21, 2011 | 2004 Chevrolet TrailBlazer

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2003 trailblazer v6 with codes P1133, p1028 & P0171 are these all related? And how serious is this? Whats the worst possible scenario? I'm buring alot of gas with a slight smell of gas?


I've had all these at the same time also. P1133 is your upstream 02 sensor, very easy, maybe 15 min to replace. p1028, is your thermostat reading a low temperature, replace this, or have someone replace it for you. P0171 is the downstream 02, difficult one to do if you're not mechanically inclined. Nothing horrible here, OK to drive, but if you want better gas milleage, get this fixed. The gas smell might be a different problem all togeher, there is a recall from a leaking gas tank.

Oct 18, 2010 | 2003 Chevrolet TrailBlazer

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