Circuit/System Verification
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify that the AIR pump is not activated.
- Ignition ON, observe that the AIR Pressure Sensor parameter approximately equals BARO.
- If not equal, verify that the BARO reading is correct for your altitude. Refer to Altitude Versus Barometric Pressure . If the reading is not correct for your altitude, diagnose the MAP sensor. Refer to DTC P0106 .
- Engine running, enable the AIR solenoid with a scan tool and observe that the AIR Pressure Sensor parameter equals approximately 8-10 kPa above BARO.
- If less than the specified range, verify that the AIR pump is activating. If AIR pump activation is normal, inspect the hoses/pipes between the pump and the AIR solenoid valve for leaks and obstructions.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.