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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0016 To DTC P0406) >> Diagnostic Information and Procedures >> DTC P0101: Mass Air Flow (MAF) Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine running at a warm stabilized idle, perform the following:
    1. Command the EGR solenoid to 0% with a scan tool.
    2. Observe the Induction System Leak Indication parameter for 10 s. The value should be between 0.80:1 and 1.20:1.
    3. Observe the Induction System Leak Indication parameter while slowly increasing the engine speed until reaching wide open throttle (WOT). After 10 s, the value should stabilize and be between 0.80:1 and 1.20:1.
    • If stable after 10 s and between 0.80:1 and 1.20:1. 
  2. Ignition ON.
  3. Verify that DTCs P0102, P0103, P0106, P0403 or P046C are not set.
    • If no DTC sets. 
  4. Ignition ON, verify the scan tool MAP Sensor and BARO Sensor 2 parameters are within 4 kPa (0.58 PSI) of each other.
    • If not within 4 kPa (0.58 PSI). 

      If greater than the specified range, refer to DTC P0106  for further diagnosis.

    • If within 4 kPa (0.58 PSI). 
  5. Verify that leaks do not exist in the induction system. Refer to Charge Air Cooler Diagnosis (Induction System Air Leak Test) , Charge Air Cooler Diagnosis (Induction System Smoke Test) and Charge Air Cooler Diagnosis for Induction System Smoke Testing.
  6. Verify that leaks and restrictions do not exist in the exhaust system. Refer to Symptoms - Engine Exhaust .
  7. Engine idling at normal operating temperature. Verify the scan tool MAF Sensor parameter is between 5-40 g/s.
    • If between 5-40 g/s 
  8. 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 changes smoothly and gradually 
  9. 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.
  10. Verify a DTC does not set.
    • If the DTC does not set 
  11. All OK.
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