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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (1 Of 5)) >> Diagnostic Information and Procedures >> DTC P0101 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine - Idling
  2. Verify DTC P0016, P007B - P007E, P00E9, P00EA - P00EC, P0096 - P0099, P0102, P0103, P0106 - P0108, P0111 - P0114, P0116 - P0119, P0128, P0201 - P0204, P020A - P020D, P0216, P02E8, P02E9, P0261, P0262, P0264, P0265, P0268, P026A, P0270, P0271, P0405, P0406, P049D, P0502, P0503, P062B, P062D, P062F, P0722, P0723, P10D5 - P10D8, P122D, P12B0 - P12B2, P12AF, P1248, P1249, P2004, P2006, P2008 - P2010, P201B, P201D, P20F8, P2147, P2148, P2150, P2151, P2227 - P2230, U060F is not set.
    • Go to next step: If none of the DTCs are set 
  3. Increase the engine speed slowly to 1, 600 RPM and then back to idle.
  4. Perform the scan tool function: Review Stored Data
  5. Observe the scan tool parameter frame by frame with a scan tool: Mass Airflow Sensor

    Verify the scan tool parameter: Mass Airflow Sensor = The value should not spike or drop out.

    • If the value spikes or drops out 

      Refer to: Circuit/System Testing

    • Go to next step: If the value does not spike or drop out 
  6. Verify the scan tool parameter: Mass Airflow Sensor = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B75 Mass Airflow Sensor
    • Wiggle the harness and connector: K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)

    • Go to next step: If the value does not spike or drop out 
  7. Verify the scan tool parameter: Induction System Leak Indication = 0.70: 1 to 1.20: 1 - Stable
    • If not in the specified range 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Verify the following conditions do not exist:
    • B65 Intake Manifold Pressure and Air Temperature Sensor - Leaking @O-Ring - Missing/Visible Damage
    • B75 Mass Airflow Sensor - Contamination of the measuring element/Water intrusion/Leaking/Visible Damage
    • Q14 Exhaust Gas Recirculation Valve - Stuck Open/Leaking
    • Q22 Intake Manifold Tuning Solenoid Valve - Binding or Sticking
    • Air Cleaner Element - Dirty/Restricted
    • Charge Air Cooler
    • Exhaust System - Loose/Missing components/Restricted/Visible Damage - Refer to: Symptoms - Engine Exhaust
    • Intake Air Duct - Collapsed/Loose Clamps/Restricted/Visible Damage
    • Intake Manifold - Cracked/Loose Clamps/Visible Damage
    • Positive Crankcase Ventilation Oil Separator - Cracked/Leaking/Loose Clamps/Restricted
      • If a condition exists - Repair or replace as necessary
    • Go to next step: If in the specified range 
  8. 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 is set 

      Repeat step 2

    • Go to next step: If the DTC is not set 
  9. All OK.
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