Air Injection: Testing and Inspection

Secondary Air Injection System (Overview)
A problem with the AIR system may set one of the following DTCs:

^ DTC P0410

^ DTC P1415

^ DTC P1416

Refer to the Secondary Air Injection System for diagnosis of the AIR system.

Air flowing to the exhaust ports at the wrong time can cause a false lean HO2S indication and cause the VCM to add extra fuel. This will result in increased catalytic converter temperature, because more fuel and air will be oxidizing in the converter. The AIR system is not completely noiseless. Under normal conditions noises rises in pitch as engine speed increases.

If noise is caused by the AIR system, check for the following:

^ A seized AIR pump.

^ Proper mounting and bolt torque of the pump Proper routing and connections of the hoses.