Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify DTC P0697 or P06A3 is not set.
- If any of the DTCs are set
  Refer to DTC P0641, P0651, P0697, or P06A3 for further diagnosis.
- Go to next step: If none of the DTCs are set
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.
- Go to next step: If OK is displayed
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.
- Go to next step: If Agree is displayed
Verify that DTC P2122, P2123, P2127, P2128, or P2138 is not set.
- If any of the DTCs are set
  Refer to Circuit/System Testing.
- Go to next step: If none of the DTCs set
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.
Verify the DTC does not set.
- If the DTC sets
  Refer to Circuit/System Testing
- Go to next step: If the DTC does not set
All OK.