Code No. P0068: Trustful Check Air Flow Sensor




FUNCTION




TROUBLE JUDGMENT


Check Condition
Judgement Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code


Q. Is any other diagnosis code than P0068 set?

Inspection chart for diagnosis code (Refer to ).
Go to Step 2.

STEP 2. M.U.T.-III data list



  • Data list reference table (Refer to ).

  1. Item 10: Air flow sensor

Q. Is the check result normal?

Go to Step 3.
Check air flow sensor system. Check code No. P0102: air flow sensor circuit low input (Refer to ). Check code No. P0103: air flow sensor circuit high input (Refer to ).

STEP 3. Check air intake from inlet hose and inlet manifold.


Q. Is the check result normal?

Go to Step 4.
Repair.

STEP 4. Check air flow sensor.



  • Check that there is not foreign matter around air flow sensor.

Q. Is the check result normal?

Go to Step 5.
Repair.

STEP 5. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).