Results of Incorrect Operation

The engine control module (ECM) monitors the Secondary air injection (AIR) System for faults during cold start-up operation. When the system's pressure or relay circuits operations vary too far from the predicted values, a DTC will set. Diagnostics detect the following conditions:

• A partially blocked or leaking AIR system
• A malfunctioning AIR pump
• A malfunctioning AIR control solenoid valve/pressure sensor assembly
• A malfunctioning AIR pressure sensor
• A restricted exhaust system, forward of the catalytic converter
• A malfunctioning AIR pump and AIR valve relay

The following DTCs set when an AIR system fault is detected:

• DTC P0411-An AIR system insufficient airflow fault condition has been detected.
• DTC P0412-An AIR valve relay coil circuit fault condition has been detected.
• DTC P0418-An AIR pump relay coil circuit fault condition has been detected.
• DTC P2430-An AIR pressure sensor stuck in range fault condition has been detected.
• DTC P2431-An AIR pressure sensor range/performance fault condition has been detected.
• DTC P2432-An AIR pressure sensor signal voltage below the minimum range of the sensor fault condition has been detected.
• DTC P2433-An AIR pressure sensor signal voltage is above the maximum range of the sensor fault condition has been detected.
• DTC P2440-An AIR check valve stuck open or airflow leak fault condition has been detected.
• DTC P2444-An AIR pump stuck ON fault condition has been detected.