Question about 2005 Ford Freestyle SEL

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Code P0171 MOD $00

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You'll find your local auto parts store probably has a spray cleaner for the MAF sensor. They are FRAGILE, so be careful, but this solves a lot of problems.

Posted on Nov 29, 2014

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P0171 means your fuel mixture is not right in one of your banks, (left or right, if straight engine only 1bank), try cleaning your maf sensor

Posted on Nov 29, 2014


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98 dodge ram 1500 5.9L 2wd codes P0300, P0301, P0302, P0303, P0171. What all do I need to do to resolve??

the p0300--p0301-p0302=p0303 are misfire codes and can mean needs tune up or wiring problem and p0171 is system to lean bank 1 with this code if you correct it will probably correct the misfire codes your receiving Fixing Hesitating Car P0171 Code YouTube P0171 System Too Lean Bank 1

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How can I be sure if my PCM is bad???

I would try disconnecting battery again. Disconnect both cables and touch them together for a few seconds. This will reset all modules. Wierd that you had so many codes after just disconnecting battery. Sometimes very hard to tell if ecm is bad.

Dec 01, 2014 | 2006 Pontiac Torrent

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What does P0171 system to lean bank 1 mean on my 2000 Lexus RX300?

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Apr 10, 2014 | 2000 Lexus RX 300

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2000 Toyota tacoma with code P0171.

You don't say if it is a 4 cyl or 6 cyl engine.
The code means the O2 sensor is telling the computer the engine fuel mixture is too lean and the computer can not make the injectors provide enough extra fuel to make the sensor go rich.
Reasons can be a faulty cooling thermostat, low fuel pressure, vac leaks, exhaust leaks, and other engine problems.

Jul 28, 2012 | Cars & Trucks

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Hyundai tucson code P0171

P0171 means the vehicle computer is showing the air fuel mixture is lean. There are many things that can cause this code but you can try DIY first.
watch this video and you will know how to do exactly

good luck

Nov 29, 2011 | 2005 Hyundai Tucson

1 Answer

How to repair odb2 code p0171

P0171 means that an oxygen sensor in bank 1 detected a lean condition meaning there is to much oxygen in the exhaust. Bank 1 is the front side of the engine. There's other things that can trigger that p0171 code like the MAF (Mass Air Flow) Sensor which could be dirty or faulty. There could be a vacuum leak downstream of the MAF sensor.

Before you try to replace that MAF sensor, take it off and clean it which a Brake cleaner. Try not to damage the sensor and make sure to clean it dry before putting it back in. The MAF sensor is located on the throttle body. It looks like this (They are small and expensive, try cleaning it first before buying a brand new one, not a remade [the cheaper one]):

Inspect all vacuum and PCV hoses, replace if they look bad. Check for a dirty fuel filter and proper fuel pressure then it should be back up and running good.

Aug 27, 2010 | 1997 Oldsmobile 88

4 Answers

I have four codes. P0136, P0141, P0171, P0401.

p0136 and p0141 are o2 sensors and p0401 is a egr flow and the p0171 means its running lean on low bank 1

Jun 30, 2010 | 1996 Ford Econoline

1 Answer

An Engine Light came on the dashboard of my 2003 Ford Windstar.The code came up saying p0171 (Fuel System too lean.(Cylinder bank 1) What does this mean?

P0171=System Too Lean Bank 1,
not cylinder 1,it means the oxygen sensor on the drivers side exhaust was stuck on lean and set a code.
doesn't mean you need to change the oxygen sensor yet,first clear the code and see if it corrected its self.

Dec 16, 2009 | 2003 Ford Windstar

1 Answer

1996 ford ranger CODE P0171 B1

P0171 - system to lean - bank 1 try this address and it should explain what you need to know...(There is probably some stuff that doesn't apply though)...upon further research I've seen many people pointing to a bad o2 sensor causing this code to appear so that may be the issue.
hope this helps.........Good Luck!

Dec 19, 2008 | 1996 Ford Ranger SuperCab

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