DTC P0101: Mass Air Flow Circuit Range / Performance Problem: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read DTCs.

   Result

   Display (DTC Output)	Proceed to
   P0101	A
   P0101 and other DTCs	B

   HINT: 

   If any DTCs other than P0101 are output, troubleshoot those DTCs first.

B → GO TO DTC CHART 

A: Go to next step 

1. Check the intake system for vacuum leakage.

   OK

   No leakage from air induction system.

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

OK

PCV hose is connected correctly and is not damaged.

NG → REPLACE PCV HOSE 

OK: Go to next step 

1. Replace the mass air flow meter. Refer to REMOVAL .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
5. Turn the engine switch off and wait for 30 seconds.
6. Turn the engine switch on (IG) and turn the Techstream on.
7. Start the engine and warm it up.
8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
10. Input the DTC: P0101.
11. Check the DTC judgment result.
    RESULT
    
    

    Techstream Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
    UNKNOWN	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

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