DTC P1416: Secondary Air Injection (Air) System - Bank 2: Notes

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For circuit reference, see WIRING DIAGRAMS article.

AIR pump is used to lower tailpipe emissions on start-up. 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.

DTC will set when PCM determines that the HO2S voltages for both banks did not respond as expected during the test. If only one sensor responded, PCM sets either DTC P1415 or P1416 to indicate which bank the AIR is inoperative.