Circuit/System Verification
WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- If any Secondary Air Injection System Pressure Sensor Circuit DTCs are set, perform those diagnostics first.
- Inspect the AIR hoses/pipes between the pump and the AIR solenoid for leaks.
- Engine running, enable the AIR pump relay and observe that the AIR Pressure Sensor parameter increases to approximately 20-25 kPa above barometric pressure (BARO).