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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1057 (Engine Controls And Fuel - 6.6L - DTC P1224 To DTC P2463) >> DTC P154B >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the ignition ON, observe that the IA Heater under voltage parameter displays OK.
  2. Observe that the IAH can be command ON with a scan tool.
  3. Engine running, observe the DTC information with a scan tool. DTC P154B should not set.
  4. 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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