DTC Advanced Diagnostics: P2228, P2229
DTC P2228:Barometric Pressure (BARO) Sensor Circuit Low Voltage
DTC P2229:Barometric Pressure (BARO) Sensor Circuit High Voltage

General Description

The barometric pressure (BARO) sensor is built into the powertrain control module (PCM), and it monitors atmospheric pressure. The BARO sensor output voltage is converted to A/D in the sensor inside, and transmitted to a CPU by serial communication. If the atmospheric pressure value sent from the BARO sensor is abnormal, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
2.0 seconds or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
 
Vehicle
ON mode

Malfunction Threshold
DTC: P2228

The BARO sensor output value [Baro Sensor] is 44 kPa (336 mmHg, 13.2 inHg) or less for at least 2.0 seconds.

DTC: P2229

The BARO sensor output value [Baro Sensor] is 116 kPa (865 mmHg, 34.1 inHg) 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
PCM 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 PCM 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 12 volt battery.