Help me please My check engine light turned on today and i had the code ran at auto zone, and it came back with code p0171 (the fuel system for bank one was to lean) the employees there had no clue what that meant. so i went to checker auto and they ran the same code but it came back with fuel system to lean due to the MAF sensor what does this mean , how can i fix it, is it expensive......any help is greatly appreciated.....any one else have this problem with their audi, by the way i have a 2002 a4 Q auto. thank you all in advance..

 

umm i think ur maf is gunna die soon, they are 87 bucks from audi well for a 2001 that is. i think im on my 6th or 7th maf, easy to replace tho

 

are they always going out? is there any way to maintenance them? by the way where are they or it?

 

o mine are going out for a different reason then urs. there maybe a little bit of oil on the sensor. o ya MAF=Mass Air Flow sensor, it is located in the airbox there are wires going to the top of the airbox that then lead to the maf

 

so can you just clean them, if my sensor has oil on it?

 

No they aren't always going out. It's not abnormal for it to go out at 70k miles or so. You can try spraying the MAF element with a electronics tuner cleaner. I doubt it will do a whole lot though.

 

you could just clean them up.

 

first i would disconnect ur negative conection to teh battery for 5 min or so and then reconnect it and see if the cel goes away.

 

wow that is perfect timing..jestnomen..my car has 69890 miles on it....when i take it apart will i be able to tell what exactly i need to spray with that cleaner?

 

jeff..they erased the code, the light shut off for like one mile then it came back on. does that mean it for sure needs to be replaced