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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1385 (Engine Controls And Fuel - 6.6L - DTC P1448 To DTC P2510) >> DTC P20E2 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Determine the ambient temperature by using an accurate thermometer.
  1. If the ignition has been OFF for greater than 5 hours, determine which EGT sensor is skewed by comparing EGT Sensor 1 and 2 parameters to the ambient temperature with a scan tool. The readings should be within 19°C (34°F) of each other and also the ambient temperature.
  2. Ignition ON, observe the scan tool EGT Sensor 1 and 2 parameters. The readings should be between -40 to +999°C (-38 to +1,830°F) depending on the current ambient temperature and the vehicle operating conditions
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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