Test II
- During this test, PCM will activate the AIR pump during "closed loop" operation. When AIR is activated, PCM will monitor HO2S voltages and short term fuel trim values for both engine banks. If AIR is operating properly, HO2S voltages should go low and short term fuel trim should go high.
- PCM checks that the HO2S voltages return to a rich threshold when pump is disabled. If PCM determines that the HO2S voltages for both banks did not respond as expected during tests, DTC P0410 will set. If only one sensor responded, PCM will set either DTC P1415 or P1416 to indicate which bank the AIR system is inoperative.