LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0443 To DTC P3452 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P2122, P2123, P2127, P2128 Or P2138: Accelerator Pedal Position (APP) Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC P0697 or P06A3 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the APP Sensor 1 Circuit Status and APP Sensor 2 Circuit Status displays OK.
    • If OK is not displayed 

      Refer to Circuit/System Testing below.

    • Go to next step: If OK is displayed 
  4. Verify the scan tool APP Sensor 1 and 2 Agree/Disagree parameter displays Agree while performing the tests listed below:
    • 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.
    • If Agree is not displayed 

      Refer to Circuit/System Testing below.

    • Go to next step: If Agree is displayed 
  5. Verify that DTC P2122, P2123, P2127, P2128 or P2138 is not set.
    • If any of the DTCs are set 

      Refer to Circuit/System Testing below.

    • Go to next step: If none of the DTCs set 
  6. 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.
  7. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing below

    • Go to next step: If the DTC does not set 
  8. All OK.
scientia non olet · About LEMON Manuals