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Home >> Chevrolet >> 2018 >> Trax Premier, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls And Fuel - 1.4L (LE2) - Diagnostic Information And Procedures (P0325-P2635) And Symptoms) >> Diagnostic Information and Procedures >> DTC P2122, P2123, P2127, P2128, or P2138 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0697, P06A3 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool parameter:
    • APP Sensor 1 Circuit Status=OK
    • APP Sensor 2 Circuit Status=OK
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  4. Verify the scan tool parameter:
    • APP Sensor 1 = 0.8 to 4.0 V - The value should not spike or drop out while moving the sensor through the entire range.
    • APP Sensor 2 = 0.4 to 2.0 V - The value should not spike or drop out while moving the sensor through the entire range.
    • If not in the specified range or does not change 

      Refer to: Circuit/System Testing

    • Go to next step: If in the specified range and changes 
  5. Verify the scan tool parameter:APP Sensor 1 and 2 = Agree
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  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

    • Go to next step: If the DTC does not set 
  8. All OK.
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