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 JUDGEMENT
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 for 10 seconds: approximately 4,600 m above sea level.
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 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
).