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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Control System & Fuel System - 6.6L (LLY) - DTC P0401 To DTC P2510) >> DTC P2122, P2123, P2127, P2128, or P2138 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON, observe the scan tool APP sensor 1 parameter for a normal voltage range between 0.89-4.57 volts.
  2. Ignition ON, observe the scan tool APP sensor 2 parameter for a normal voltage range between 0.41-2.19 volts.
  3. Ignition ON, compare the scan tool APP sensors 1 and 2 parameters. Verify they do not differ more than 2 percent during a full pedal sweep.
  4. Engine running, observe the DTC information with a scan tool. DTCs P2122, P2123, P2127, P2128 or P2138 should not set.
  5. 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 Records data.
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