DTC P1415: Secondary Air Injection (Air) System - Bank 1; P1416: Secondary Air Injection (Air) System - Bank 2: Description

AIR pump is used to lower tailpipe emissions on start-up. Powertrain Control Module (PCM) supplies ground to AIR pump relay, energizing pump. PCM monitors the HO2S voltages to diagnose AIR system.

During the AIR test, the PCM activates the AIR pump during "closed-loop" operation. When AIR is activated, PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If AIR system is operating properly, the HO2S voltages should go low and short term fuel trim should go high.