Results of Incorrect Operation

If no air (oxygen) flow enters the exhaust stream, the start up emission levels will rise. The control module can detect a system flow problem using the pre-catalyst Heated Oxygen Sensor (HO2S) and short term FT. If a system flow problem is present the HO2S voltage will not indicate an expected lean condition, short term FT will not increase and a diagnostic trouble code (DTC) will set.
If incorrect voltage is present on the vacuum control solenoid or the pump relay control circuits the device will not operate. This will be detected by the control module and a DTC will set.
The following DTCs can set if a secondary air injection fault is detected:
^ DTC P0410-A system flow problem has been detected.
^ DTC P0412-A vacuum control solenoid control circuit problem has been detected.
^ DTC P0418-A pump relay control circuit problem has been detected.
^ DTC P1415-A system flow problem has been detected relating to cylinder bank 1.
^ DTC P1416-A system flow problem has been detected relating to cylinder bank 2.