DTC P023D: Abnormal Correlation Between Manifold Absolute Pressure Sensor And Boost Pressure Sensor
TECHNICAL DESCRIPTION
The ECM detects abnormality in the sensor by comparing the manifold absolute pressure sensor output with the boost pressure sensor output.
DESCRIPTIONS OF MONITOR METHODS
The ECM compares the manifold absolute pressure sensor output with the boost pressure sensor output after the ignition switch is in "LOCK" (OFF) position. When the difference exceeds the specified value between them, the ECM determines whether the manifold absolute pressure sensor / the boost pressure sensor has malfunction or not.
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
- Engine coolant temperature sensor
- Manifold absolute pressure sensor
- Boost pressure sensor
DTC SET CONDITIONS
Check Conditions
- Ignition switch is in "LOCK" (OFF) position.
- After 2 seconds pass from the time when the engine is stopped.
- Engine coolant temperature is higher than 0°C (32°F).
Judgment Criterion
- Difference between manifold absolute pressure sensor output and boost pressure sensor output is more than 12.4 kPa (3.66 in.Hg) for 2 seconds.
FAIL-SAFE AND BACKUP FUNCTION
OBD-II DRIVE CYCLE PATTERN
- Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
- Boost pressure sensor circuit harness damage, or connector damage.
- Manifold absolute pressure sensor circuit harness damage, or connector damage.
- Boost pressure sensor failed.
- Manifold absolute pressure sensor failed.
- ECM failed.