GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 Engine 🢒 Engine Controls and Fuel - 4.4L 🢒 Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Removal Procedure

    Object Number: 1614177 Size: SH
  1. Remove the front engine compartment sight shield. Refer to Front Compartment Sight Shields Replacement.
  2. Disconnect the mass air flow (MAF)/intake air temperature (IAT) sensor electrical connector.
  3. Remove the MAF/IAT sensor screws.

    4. Caution: 

       • Handle the MAF sensor carefully.
       • Do not drop the MAF sensor in order to prevent damage to the MAF sensor.
       • Do not damage the screen located on the air inlet end of the MAF.
       • Do not touch the sensing elements.
       • Do not allow solvents and lubricants to come in contact with the sensing elements.
       • Use a small amount of a soap based solution in order to aid in the installation.

  4. Carefully remove the MAF/IAT sensor (1) from the air cleaner housing cover duct.
  5. Discard the MAF/IAT sensor gasket.

Installation Procedure

    Object Number: 1614177 Size: SH

    Caution: 

       • Handle the MAF sensor carefully.
       • Do not drop the MAF sensor in order to prevent damage to the MAF sensor.
       • Do not damage the screen located on the air inlet end of the MAF.
       • Do not touch the sensing elements.
       • Do not allow solvents and lubricants to come in contact with the sensing elements.
       • Use a small amount of a soap based solution in order to aid in the installation.

  1. Install a NEW MAF/IAT sensor gasket.
  2. Carefully install the MAF/IAT sensor (1) into the air cleaner housing cover duct.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the MAF/IAT sensor screws and tighten to 4 N·m (35 lb in).
  4. Reconnect the MAF/IAT sensor electrical connector.
  5. Install the front engine compartment sight shield. Refer to Front Compartment Sight Shields Replacement.