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DTC P2228: Barometric Pressure Circuit Low Input
 
 
 
 
TECHNICAL DESCRIPTION
  • The barometric pressure sensor outputs a voltage which corresponds to the barometric pressure.
  • The ECM checks whether this voltage is within a specified range.
 
 
DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage is out of reasonable barometric pressure range.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • More than 2 seconds have passed since the engine starting sequence was completed.
  • Battery positive voltage is higher than 6 volts.
Judgment Criterion
  • Barometric pressure sensor output signal is less than 49 kPa (14.5 in.Hg) (approximately 15,000 ft above sea level) for 10 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Control as if the barometric pressure is 101 kPa (29.8 in.Hg).
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 2 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
  • ECM failed.

 
 
DIAGNOSIS
STEP 1. Test the OBD-II drive cycle.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn the ignition switch to the "ON" position and delete the DTC.
(3) Carry out the test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 2 .
(4) Check the diagnostic trouble code (DTC).
Is DTC P2228 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 2.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
 
STEP 2. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 2 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P2228 set?
Retry the troubleshooting.
The inspection is complete.