Use and Care Manual

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tests on the oxygen (O2) sensors to identify problems related to fuel
efficiency and vehicle emissions. These tests are not on-demand tests and
they are done automatically when engine operating conditions are within
specified limits. These test results are saved in the on-board computer's
memory.
The O2 Monitor Test function allows retrieval and viewing of O2 sensor
monitor test results for the most recently performed tests from the vehicle's
on-board computer.
The O2 Monitor Test function is not supported by vehicles which
communicate using a controller area network (CAN). For O2 Monitor Test
results of CAN-equipped vehicles, see chapter “On-Board Mon. Test”.
1) Use the UP/DOWN scroll button to select O2 Monitor Test from
Diagnostic Menu and press OK button (Figure 4- 1).
2) Wait a few seconds while the scan tool validates the PID MAP.
3) Use the UP/DOWN scroll button to select O2 sensor from O2 Monitor
Test menu and press OK button.
 If the vehicle does not support the mode, an advisory message will
be displayed on the screen.
Figure 4- 17 Sample O2 Monitor Test Menu