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
  • 2 seconds or more have passed since the engine starting sequence was completed.
  • Battery positive voltage is higher than 8 V.
Judgment Criterion
  • Barometric pressure sensor output signal has continued to be 49 kPa or lower (approximately 4,600 m above sea level) for 10 seconds.

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 ).