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MAF...or Oxygen Sensor

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Old Jun 26, 2008 | 03:58 PM
  #1  
bboyer32's Avatar
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MAF...or Oxygen Sensor

Ok, I've read plenty about the Mass Air Flow sensor trigoring the Check Engine Light (which I have), and I have read out the OBD codes...P0171 anf P0174. I know this means both banks of cylinders of running "lean", and this is commonly an issue of the Mass Air Flow sensor. I am going to try and clean it first, prior to the possibility of replacing it. But could it just be an oxygen sensor? Or does that throw a different code?

I'm just trying to determine if this could be either one of the O2 Sensor, or the MAF sensor. I don't want to go purchasing a MAF sensor if it could be an O2 sensor. If so, how would I determine it's an O2 sensor?
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Old Jun 26, 2008 | 06:40 PM
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2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
You can tell if the computer used to do the read out is a correct unit, ie the MB Star diagnostic system.
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Old Jun 26, 2008 | 11:52 PM
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Originally Posted by bboyer32
... I am going to try and clean it first, prior to the possibility of replacing it. ...
Did clearning the MAS and resetting the code work?
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Old Jun 27, 2008 | 12:59 AM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Diy cleaning on

benzworld.org w210 diy section,take the insert out and use only CRC brand maf cleaner.
http://www.autohausaz.com/search/pro...0Mass%20Sensor
$168 bosch.
Changed your fuel filter?That will trip those codes also.
ohlord
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