Advanced Diagnostics

Advanced Diagnostics - DTC P2229: Barometric Pressure (BARO) Sensor Circuit High Voltage (Engine Type: K24Z7)

General Description











The barometric pressure (BARO) sensor is built into the engine control module (ECM), and it monitors atmospheric pressure. The ECM estimates appropriate intake airflow from the manifold absolute pressure (MAP) sensor output voltage and the BARO sensor output voltage. If the BARO sensor output voltage is a specified value, the ECM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The BARO sensor output voltage [BARO SENSOR] is 4.49 V or more for at least 2.0 seconds.

[ ]: HDS Parameter

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

- BARO sensor failure
- ECM internal circuit failure

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the ECM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.