P2227 - Engine Running Rationality Test
WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects, when the engine is running, that the BARO sensor signal has increased or decreased by greater than 10 kPa from the previous ignition OFF, and the BARO sensor is not within a calibrated range of the boost pressure sensor for greater than 4 s continuously or 50 s cumulative.
OR
- The ECM detects, when the engine is running, that the BARO sensor signal has increased or decreased by greater than 5 kPa within 20 s, and the BARO sensor is not within a calibrated range of the boost pressure sensor for greater than 4 s continuously or 50 s cumulative.