DTC P2228: Barometric Pressure Circuit Low Input

CIRCUIT OPERATION
• A 5-volt voltage is supplied to the barometric pressure sensor power terminal (terminal No. 1) from the PCM (terminal No. 46). The ground terminal (terminal No. 5) is grounded with PCM (terminal No. 57).
• A voltage that is proportional to the atmospheric pressure is sent to the PCM (terminal No. 55) from the barometric pressure sensor output terminal (terminal No. 2).
TECHNICAL DESCRIPTION
• The barometric pressure sensor outputs a voltage which corresponds to the barometric pressure.
• The PCM 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 stored 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
2 seconds or more have passed since the starting sequence was completed.
Battery positive voltage is higher than 8 volts.

Judgement Criteria
• Barometric pressure sensor output has continued to be approximately 49.5 kPa (14.6 in.Hg) or lower (approximately 15,000 ft above sea level) for 10 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
• Barometric pressure sensor failed.
• Open or shorted barometric pressure sensor circuit, harness damage or connector damage.
• PCM failed.