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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Engine Controls And Fuel - 2.2L - DTC P0351 To DTC P2544) >> DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the DTC information with a scan tool. Verify DTC P0641 or P0651 is not set.
  2. Observe the scan tool APP sensor 1 and 2 voltage parameters. Both parameters should be between 0.13-4.87 V and change with accelerator pedal input.
  3. Observe the scan tool APP Sensor 1 and 2 Agree/Disagree parameter while performing the following tests:
    • Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the procedure several times.
    • Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.

      The APP Sensor 1 and 2 Agree/Disagree parameter should display Agree.

  4. Clear the DTCs with the scan tool. Operate the vehicle within the Conditions for Running the DTC or within the conditions that you observed from the Freeze Frame/Failure Records.
  5. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P2120 or P2125 are not the only accelerator pedal position DTCs set.
    • If DTC P2120 or P2125 are the only DTCs set, replace the ECM.
  6. Operate the vehicle within the Conditions for Running the DTC to verify 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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