Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Monitor Status Check: Notes
The purpose of the monitor result (mode 06) is to access the on-board diagnostic monitoring test result in the particular component or system that is continuously monitored. This is applicable to the catalyst and/or evaporative gas (EVAP) system. Owing to the monitoring result, the monitor status and test value (test lower limit, test upper limit) are displayed on the OBD II scan tool. These data are displayed after the monitor has been turned on by the vehicle.
If the test result value is not within the range of upper limit and lower limit, the ECM (PCM) regards this as an abnormality. If the test result value is at the limit, abnormality is likely to occur in the near future in the relevant component.
For details on particular procedures, refer to the operation manual for the scan tool to be used.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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