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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0010 To DTC P0246) >> Diagnostic Information and Procedures >> DTC P0121-P0123, P0222, P0223, or P2135: Throttle Position Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. If you were sent here from DTC P0068, P0101, P0106, or P1101 refer to Circuit/System Testing.
  3. Verify that DTC P0641, P0651, P0697, or P06A3 is not set.
    • If none of the DTCs are set 
  4. Verify the scan tool Throttle Body Idle Airflow Compensation parameter is less than 90 %.
    • If less than 90 % 
  5. Verify the scan tool Throttle Position Sensor 1 and Throttle Position Sensor 2 voltage parameters are between 1.0-4.0 V and change with accelerator pedal input.
    • If not between 1.0-4.0 V or does not change 

      Refer to Circuit/System Testing

    • If between 1.0-4.0 V and changes 
  6. Verify the scan tool Throttle Position Sensor 1 and 2 Agree/Disagree parameter displays Agree while performing the Throttle Sweep Test with a scan tool.
    • If Disagree 

      Refer to Circuit/System Testing

    • If Agree 
  7. Determine the current vehicle testing altitude.
  8. Verify the scan tool MAP Sensor pressure parameter is within range specified in the Altitude Versus Barometric Pressure table.
    • The MAP Sensor pressure is not in range 

      Refer to DTC P0106 .

    • The MAP Sensor pressure is within range 
  9. Engine idling.
  10. Verify the scan tool MAP Sensor pressure parameter is between 26-52 kPa (3.8-7.5 psi) and changes with accelerator pedal input.
    • If not between 26-52 kPa (3.8-7.5 psi) or does not change 

      Refer to DTC P0106 .

    • If between 26-52 kPa (3.8-7.5 psi) and changes 
  11. Verify the scan tool MAF Sensor g/s parameter changes smoothly and gradually as the engine speed is increased and decreased while performing the actions listed below.
    1. Engine idling
    2. Perform the scan tool snapshot function.
    3. Increase the engine speed slowly to 3,000 RPM and then back to idle.
    4. Exit from the scan tool snapshot and review the data.
    5. Observe the MAF Sensor parameter frame by frame with a scan tool.
    • The MAF Sensor parameter does not change smoothly and gradually 

      Refer to DTC P0101 .

    • The MAF Sensor parameter changes smoothly and gradually 
  12. Verify the scan tool Boost Pressure Sensor pressure and BARO parameters are within 3 kPa (0.4 psi).
    • The parameters are not within 3 kPa (0.4 psi) 

      Refer to DTC P0236 .

    • The parameters are within 3 kPa (0.4 psi) 
  13. Verify the scan tool MAP Sensor parameter and the Boost Pressure Sensor parameter are within 20 kPa (2.9 psi) during a WOT acceleration at the time of the 1-2 shift.
    • The parameters are not within 20 kPa (2.9 psi) 

      Refer to DTC P0236 .

    • The parameters are within 20 kPa (2.9 psi) 
  14. 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.
  15. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing

    • If the DTC does not set 
  16. All OK
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