Code No. P0642: Throttle Position Sensor Power Supply




FUNCTION



  • Engine-ECU checks the throttle position sensor power voltage for abnormal conditions.

TROUBLE JUDGMENT


Check Condition
  • Battery positive voltage is higher than 6.3 V.
Judgement Criterion
  • Throttle position sensor power voltage is 4.1 V or less.

PROBABLE CAUSE



  • Failed engine-ECU

DIAGNOSIS


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



  • Reconfirmation of diagnosis code.

Q. Is the check result normal?

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