Code No. P0068: Plausibility Check Boost/Air Flow Sensor




FUNCTION




TROUBLE JUDGEMENT


Check Conditions
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 stored?

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

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



  • Refer to Data List Reference Table .

  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 intake 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 stored?

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