Code No. P2228: Barometric Pressure Sensor Circuit Low Input


FUNCTION



  • The barometric pressure sensor converts the barometric pressure into a voltage signal and inputs the signal to the engine-ECU.
  • In response to the signal, the engine-ECU corrects the fuel injection amount, etc.

TROUBLE JUDGMENT


Check Conditions
  • More than 2 seconds have passed since the engine starting sequence was completed.
  • Battery positive voltage is more than 8 V.
Judgement Criterion
  • Barometric pressure sensor output signal is less than 49 kPa (approximately 4,600m above sea level) for 10 seconds.

FAIL-SAFE AND BACKUP FUNCTION



  • Control as if the barometric pressure is 101 kPa.

PROBABLE CAUSE



  • Failed barometric pressure sensor

DIAGNOSIS PROCEDURE

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

  • Reconfirmation of diagnosis code.

Q. Is the 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 ).