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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1663 (Engine Control System & Fuel System - 6.6L (LMM) - DTC P1448 Top DTC P2510) >> DTC P2122, P2123, P2127, P2128, or P2138 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool APP Sensor 1 parameter for a normal voltage range between 0.80-4.75 V.
  2. Ignition ON, observe the scan tool APP Sensor 2 parameter for a normal voltage range between 0.30-2.50 V.
  3. Ignition ON, compare the scan tool APP Sensor 1 Indicated and APP Sensor 2 Indicated parameters. Verify they do not differ more than 2 percent during a full pedal sweep.
  4. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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