DTC P0101: Mass Air Flow Circuit Range / Performance Problem [02/2017 - 05/2018]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

   Powertrain > Engine and ECT > Trouble Codes 

5. Read the DTCs.

   Result

   Result	Proceed to
   DTC P0101 is output	A
   DTC P0101 and other DTCs are output	B

   HINT: 

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

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [02/2017 - 05/2018] 

Result: 

A 

See step  2

1. Check the intake system for vacuum leaks.

   Refer to ON-VEHICLE INSPECTION [02/2017 - 10/2017] , or refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]

   OK

   No leaks from intake system.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the intake system.

   Refer to INITIALIZATION [02/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE INTAKE SYSTEM 

Result: 

OK 

See step  3

1. Check the PCV hose connections.

   Refer to COMPONENTS [02/2017 - ]

   OK

   PCV valve and hose are connected correctly and are not damaged.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE PCV HOSE 

Result: 

OK 

See step  4

1. Replace the mass air flow meter.

   Refer to REMOVAL [02/2017 - 10/2017] , or refer to REMOVAL [10/2017 - 12/2021]

   HINT: 

   Perform "Inspection After Repair" after replacing the mass air flow meter.

   Refer to INITIALIZATION [02/2017 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine and ECT > Clear DTCs 

5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON.
7. Turn the Techstream on.
8. Start the engine and warm it up.
9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    Powertrain > Engine and ECT > Utility 

    Tester Display
    All Readiness

11. Input the DTC: P0101.
12. 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
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Result

    Proceed to
    NEXT

Result: 

NEXT 

END