Question about 2006 Ford Five Hundred

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Code 171 174

Any idea where i find the fix for this

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  • Ford Master
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171 and 174 MAF sensor could be dirty,fuel filter,PVC.

Posted on May 06, 2013

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Posted on Jan 02, 2017

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Parking brake sticking on fixed that. But diagnoistic saying still has fault any ideas. Thanks


You have to reset the code using a code reader. Even though you have fixed the problem, you have to manually reset.

Dec 16, 2015 | 2009 Renault Grand Scenic

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On my 2002 yukon 1500 I have trouble codes of 171,174, 420 what is my problem


Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
I hope this helps.

Mar 31, 2012 | GMC Yukon XL Cars & Trucks

1 Answer

Keep getting ses codes p507 p171 p174


The codes you show are all about air leaks. The 507 is about the IAC and may simply be the system noting the connection was unplugged.

The 171,174 are lean codes and usually mean more air is coming in than is needed. Did you use a water mist to check for leaks? Have you checked Vacuum solenoids for leaks?, the EGR diaphram?

You did not indicate the engine and vehicle this problem was on. Some of the 6 cylinder products had sandwich type manifolds and the upper and lower chambers had a gasket which would dissolve and leak internally.

Some people have had problems with the runners on dual plane manifolds, but I question whether a 171, or 174 could generate from this defect.

I think you should retest with a water spray after clearing the computer.

Jan 24, 2012 | Cars & Trucks

1 Answer

2005 honda civic ex engine light and trans want swift to last ge


It is possible that the emission problem that triggered the check engine light has something to do with the car not shifting into high gear. You need to have the honda scanned for codes to see what exactly is wrong, correct the problem, and see if the transmission issues clear up after the fix. Parts stores offer a free check of engine codes, and can explain what they mean and offer ideas on how to fix the problem. If after getting the codes you still have questions, post them here with the code #'s.

Sep 10, 2009 | 2005 Honda Civic

1 Answer

Check engine light is on,codes 171,174,system lean,codes came back as 2 oxygen sensor's before cat/conv,do they need to be replaced or could it be something else causing it, any help would be great!!!


O2 SENSORS ARE BAD MOST LIKELY I WOULD CHANGE THEM DISCONNECT THE BATTERY FOR 5 MIN. ( IF YOU DONT HAVE A SCANNER) THIS WILL RESET YOUR COMPUTER AND SHOULD MAKE THE SERVICE ENGINE LIGHT GO OUT.

May 19, 2009 | 1999 Ford Ranger SuperCab

1 Answer

I have a 2004 Chrysler 300M and am getting fault codes P0344 & P0340. Any ideas of the issue and if the fix is something a can do?


Those 2 codes are for the cam sensor. Replace the cam sensor and that should fix your issue.

Mar 19, 2009 | 2004 Chrysler 300M

1 Answer

Air bag code


We bought the car about 4 mounth ago and as far as i know it has not been in an accident.
And yes the horn does work. I unhooked the battery cables to reset the code and now it started flashing the code 3 blinks and then 2 blinks code32. any idea what this code is for and how to fix this. THANKS

Oct 22, 2008 | 1994 Ford Escort

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