Code Definition

P2226 — Barometric Pressure Sensor ‘A’ Circuit Range/Performance

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Mazda

About P2226

P2226 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Mazda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2226 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2226 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Powertrain Control Module (PCM) monitors the Barometric Pressure Sensor A signal and compares it against expected values based on known atmospheric pressure limits and correlated inputs such as Manifold Absolute Pressure (MAP), engine load, and altitude changes. DTC P2226 is set when the BARO sensor signal is electrically plausible but does not respond correctly to changes in operating conditions, or remains outside the expected calibrated range for a specified period. The barometric reading lets the PCM compensate fuel, spark, and turbo or EGR control for altitude and weather, and on many...

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