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Need Help P0171 and P0174

 
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ddc281


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PostPosted: Thu Apr 12, 2012 11:41 pm    Post subject: Need Help P0171 and P0174 Reply with quote

I've had these codes for awhile can't figure out what it is the truck runs great nothing seems to be wrong just throwing a light and i need to get it inspected cause its been out since last September.
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Dillon
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ruff84


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PostPosted: Fri Apr 13, 2012 12:08 pm    Post subject: Reply with quote

Could be a number of things causing it, here is what the codes mean.

P0171 -- Fuel trims systems lean bank 1

P0174 -- Fuel trims systems lean bank 2

Have you tried reseting the computer and see if they come back?

Try cleaning the throttle body since it's easy and free. Check for leaks in the exhaust manifolds. If all else fails buy new 02 sensors, don't buy the bosch ones buy OEM because i and alot of others have had problems with the bosch o2 sensors.

Make sure you reset the computer after you try each thing and drive it atleast 50 miles and see if the codes come back.

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ddc281


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PostPosted: Fri Apr 13, 2012 12:29 pm    Post subject: Reply with quote

Yeah i know it can be a lot of things. I cleaned the throttle body check for vacuum leaks. Im going to check for manifold leaks today. i just have no idea what it is its been like this since last August. It use to go on and off but now i clear the code and as soon as i back out of my driveway its back on.
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Meengreen5.2
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PostPosted: Fri Apr 13, 2012 12:46 pm    Post subject: Reply with quote

i've purchased non oem sensors and my truck ran fine.... but yeah check what they already said first. if not, your truck's pcm may be trippin'
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