2009 cobalt 2.2L MAF sensor backpin readings

Discussion in 'Engine/ Performance' started by jcy110, Sep 8, 2019.

  1. jcy110

    jcy110 Junior Member

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    Hi, I want to check the MAF sensor on my 2009 Cobalt LT. I am getting code P0102 Circuit Low Frequency (sensor parameter is less than 1035 Hz for greater than .5 second) I am trying to measure each of the 5 wires at the back of the connector to see if they are reading properly at idle. I have a voltage meter and one that has a Hz setting. What readings should I get on A,B,C,D,E? I don't understand some of the schematic symbols.....

    The Live Data reading on a scan tool is 0.00 lb/min with the engine running.

    Symptoms are engine rough and shaking with reduced engine power and traction control on the led display.

    Any help on the pin readings or anything else would be appreciated, thanks!

    2009 Cobalt MAF schematic 9-2-2019.jpg 2009 2.2L Cobalt LT MAF connector.jpg
     
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  2. David Cotto

    David Cotto Junior Member

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    Tha
     
  3. David Cotto

    David Cotto Junior Member

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    Thank you so very much, been having trouble finding the right maf sensor schematics and pin out on a 2009 Cobalt 2.2, with no luck, search under 2010 and bingo, Speedometer not working, EPS Message found SOMEONE changed the maf Sensor and put the wires in the wrong order, which gave it a Short in the Tps harness, will give a Follow up Report, Thanks again
     

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