O2 Monitor Test. Autel ML629, MaxiLink ML629

O2 Monitor Test

OBD II regulations set by the (Society of Automotive Engineers) SAE require vehicles monitors and tests on the oxygen (O2) sensors to identify problems related to fuel efficiency and vehicle emissions. These tests are done automatically when engine operating conditions are within specified limits.

These test results are saved in the vehicle’s 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 that 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 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.

Figure 4-17 Sample O2 Monitor Test Menu

 If the vehicle does not support the mode, an message displays on the screen.

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Figure 4-18 Sample Nonsupport Screen

4) View test results of selected O2 sensor.

Figure 4-19 Sample O2 Sensor List

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