DTC P1415 & P1416: Air System - Bank 1 & 2: Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The secondary Air Injection (AIR) pump used on this vehicle lowers the tail pipe emissions during start-up. The AIR system consists of the following components:

The AIR pump.
The shut-off valves.
The vacuum control solenoid valve.
The system hoses and pipes.
The AIR relay, the fuses, and the related wiring.

The Powertrain Control Module (PCM) uses the AIR relay in order to control the AIR pump. The PCM also controls the AIR vacuum control solenoid valve that supplies the vacuum to the AIR shut-off valves. With the AIR system inactive, the AIR shut-off valves prevent air flow in either direction. With the AIR system active, the PCM applies ground to the AIR relay and to the vacuum control solenoid valve. Fresh air flows from the pump, through the system hoses, past the shut-off valves, and into the exhaust stream. The air helps the catalyst to quickly get to a working temperature, lowering the tail pipe emissions during a start-up.

The PCM runs a passive test and an active test in order to diagnose the AIR system. Both tests involve a response from the fuel control Heat Oxygen Sensors (HO2S). The passive test consists of 2 parts. If both passive tests pass, the PCM takes no further action. If either part of the passive test fails or is inconclusive, the PCM initiates the active tests. If the active test does not pass, the PCM may set one or more of the following DTCs:

The overall AIR system, including both banks. Any problems detected here will result in DTC P0410.
The AIR system bank 1 (DTC P1415).
AIR system bank 2 (DTC P1416).
AIR relay (DTC P0418).
AIR vacuum control solenoid valve (DTC P0412).