What are the OBD inspection items for annual vehicle inspection?

1 Answers
MacLeonardo
07/30/25 8:47am
Annual inspection OBD check items include: 1. Detecting whether there are fault codes in the engine system; 2. Checking the engine system for incomplete readiness status items. Vehicle OBD is the On-Board Diagnostics system, whose functions are: 1. Locating and describing faults in problematic components to facilitate repairs; 2. Alerting about faults causing excessive emissions to indicate increased environmental impact from pollutant emissions. The working principle of OBD: When an emission fault occurs, the ECU records the fault information and related codes, and notifies the driver through the malfunction indicator lamp or check engine light illumination.
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