DTC Advanced Diagnostics: P2226 (1.5L Engine)
DTC P2226: Barometric Pressure (BARO) Sensor Circuit Malfunction
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. When the signal is not sent from the BARO sensor or when the signal sent from the BARO sensor is abnormal and this condition continues for a specified time, 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
One of these conditions is met at least 2.0 seconds:
- The PCM does not receive signals.
- The signal sent from the BARO sensor is abnormal.
Possible Cause
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, the freeze data, and the on-board snapshot 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, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.