Darkmanx

i dont think your gonna get the answer you want from area, he is not going to list steps
1-10 for you to do. blazin did the steps you should do and like they stated its not a code for you actaully running lean , its not gonna blow your car up! so dont worry and use the search bar this code pops up atleast twice a month.

Brenticus

iTrader: (2)

Thank you Area47. I've decided that K&N are a bunch of over cautious nut jobs that don't know all of what they say because the techie Italked to said that the oiling thing is a myth, but so many people have had this happen and I used what Area47 said to look this up.

Technical DescriptionSystem Too Lean (Bank 1)

What does that mean? Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

Symptoms: 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.



Causes: A code P0171 may mean that one or more of the following has happened:

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.
Possible SolutionsPossible solutions include:

In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure

This came from www.obd-codes.com

Darkmanx

what about my thanks huh i told you that 5 hours ago wtf

Brenticus

iTrader: (2)

thanks darkmanx, i'm basically thanking anyone who said what this said as long as it worked. i didn't mean to leave you out.

Area47

it's a fuel trim error. +25 is adding fuel. will trigger a lean code
-25 is taking fuel out, this will trigger a rich code. simple maf scaling tweaks will cure this.

94firebird

ive been dealing with the P0171 for over 6mnths know and the only solution the dealer has to fix it is to rebuy the stage 2 kit and they dont even know if that will work or even fix the problem