For 1990-2009 cars

Always start the diagnosis with the Powertrain On-Board Diagnostic (OBD) system check. This process will reduce the diagnostic time and prevent an unnecessary parts replacement. The Secondary Air Injection (AIR) System diagnosis is covered in the following DTCs:

• | DTC P0410 -- Secondary Air Injection (AIR) System Constant Flow Detected

• | DTC P0411 -- Secondary Air Injection (AIR) System No Flow Detected

• | DTC P0412 -- Secondary Air Injection (AIR) Cutoff Valve Vacuum Control solenoid Control Circuit