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What does code 171 mean? - Ford Cars & Trucks

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Here is the code table: code table hope it can help you

Posted on Nov 02, 2012

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I change blank 1o2 still check engine light on code p0171


You mean bank one ?
Trouble codes never tell you what to replace, only what to test.
Code 171 means the fuel mix is too lean, which could be an injector or fuel pump problem.

Nov 20, 2015 | Cars & Trucks

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Code 171


According to the page I found at Toyota, it's a "Random cylinder mis-fire" - meaning it is not happening consistently. Here is the site for the code 300: http://engine-codes.com/p0300_toyota.html.

Also according to the same site, on this different link, is your code for the 171 which states that it is a " fuel mixture system being lean on bank one" of your engine. The site goes on in substantial detail in both cases to tell you what the cause could be and how to fix them. Best of luck with it, hope you can do it yourself. Here is the other link: http://engine-codes.com/p0171_toyota.html

Jun 15, 2014 | 2010 Toyota Corolla

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97 ford expedition has a code 171 and 174 bank 1 and 2 lean what do i do to fix this


Code 171 and 174 are for bank 1 and 2 running too lean. The engine has compensated as rich as it can go, and it is still to lean. This does not necessarily mean your mixture is bad, but something (a sensor) is telling the ECM to correct lean. The oxygen sensors alert the ECM to how lean/rich the exhaust is, and then the ECM trips a code. Maybe you have a bad oxy. sensor, but since there are 4 of them (2 per bank), I don't think they could all go at once.

Aug 31, 2013 | 1997 Ford Expedition

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PO 171 and PO 174


You did not list a vehicle, so here are the generic codes.
Code 171 is system lean bank one and code 174 is system lean bank two.
The computer is getting a signal from the O2 sensors saying the fuel system is too lean, and the computer can not make it rich.
Possible causes are low fuel pressure, vac leaks, EGR valve problems, and so on.

Jul 27, 2012 | Cars & Trucks

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Getting 171 174 on 1997 expedition found fuel filter clogged installed new one vehicle accelerates better but studders while driving


Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)

Trouble code P0174 means: Fuel System Too Lean (Cylinder 2 bank

Mar 15, 2011 | 1997 Ford Expedition

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200 lincoln ls 3.9 codes 171 174 300


171 and 174 mean it is running lean and 300 means a random cylinder misfire

May 24, 2010 | 2000 Lincoln LS

1 Answer

I have code 406 what does it mean?


on youe veicle you have to follow procedures to check O2 sensors
voltage to high more than 3.7 volts
circuit shorted or O2 sensor is no good thats for code 138
code 171 contaminated O2 sensor
406 is your EGR system shorted open thats whats probably causing your O2 sensors to contaminated fix the EGR and clean passage way to intake

May 07, 2010 | 2004 Dodge Caravan

1 Answer

98 chevy lumina. Code 113, 102, 171. runs then


the code 113 is intake air temp cicuit, high input.
the code 102 is mass air flow volume air flow circuit, low input.
the code 171 is system too lean (bank 1)
I sure hope this helps you out. Dont sound like anything too major though

Sep 23, 2009 | Chevrolet Lumina Cars & Trucks

2 Answers

Check engine light on,running rough and stalling.


means you have multiple misfires (po300) the other codes are lean codes, possiable tune up , bad injector, fuel pump,

May 07, 2009 | 2001 Isuzu Rodeo

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I have a bmw e46 316i 1999 105hp and my problem is whit an error code 171.i can't solve it.what does it mean.please help!


171; check, fuel supply system short circuit to b+

check positive (b+) connections in fuel rails, fuel pumps, fuel injectors, etc....

Feb 20, 2009 | 2004 BMW 7 Series

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