Montana, Silhouette, Venture 2000-2005

EGR Valve Position Sensor

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Operation



The Exhaust Gas Recirculation (EGR) system is used to reduce the amount of nitrogen oxide (NOx) emission levels caused by combustion temperatures exceeding 816°C (1,500°F). It does this by introducing small amounts of exhaust gas back into the combustion chamber. The exhaust gas absorbs a portion of the thermal energy produced by the combustion process and thus decreases combustion temperature.

The exhaust gas recirculation (EGR) valve is controlled by a high side driver within the powertrain control module (PCM). This high side driver uses a 12-volt pulse width modulated (PWM) signal. The ground path for the EGR valve is completed by turning in a separate driver within the PCM.

Removal & Installation



  1. Remove the air cleaner inlet duct
  2.  
  3. Disconnect the EGR valve electrical connector.
  4.  
  5. Loosen and reposition the transmission dipstick and tube.
  6.  
  7. Remove the exhaust gas recirculation (EGR) pipe.
  8.  
  9. Remove the EGR valve bolts.
  10.  
  11. Remove the EGR valve.
  12.  
  13. Remove the EGR valve gasket.
  14.  
  15. Clean the EGR valve mating surface.
  16.  

To install:

  1. Install the EGR valve with a new gasket to the intake manifold.
  2.  
  3. Install the EGR valve bolts.
  4.  
  5. Tighten the bolts to 22 ft. lbs. (30 Nm).
  6.  
  7. Install the EGR pipe.
  8.  
  9. Reposition and install the transmission fill tube and dipstick.
  10.  
  11. Connect the EGR valve electrical connector.
  12.  
  13. Install the air cleaner inlet duct.
  14.  

 
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