What if my vehicle failed the OBD check?

If your vehicle failed, it must be repaired in order to receive a new inspection sticker. Your vehicle should be repaired by a qualified, trained automotive service technician equipped with the appropriate diagnostic and repair tools. Depending on your vehicle’s age and mileage, repairs may be covered by the vehicle manufacturer’s warranty. Refer to your vehicle owner’s manual for specific information on warranty coverage.

Following are possible reasons for failing the OBD check:

  1. The vehicle’s OBD system connector has been removed or is otherwise not working properly. The OBD check cannot be completed if the connector is missing or is not working properly.
  2. The Malfunction Indicator Light does not illuminate at all when the ignition key is turned to the "on" position. When the vehicle’s OBD system detects a problem it turns on the warning light to alert the driver to a problem. However, if the light can not illuminate because the bulb has burned out or is otherwise not working, the driver would not be alerted to the problem.
  3. The Malfunction Indicator Light on the instrument panel is on (and/or commanded on by the vehicles’s on board computer) while the engine is running. This indicates that the OBD system has identified a problem which must be repaired. In this case, one or more diagnostic trouble codes will also be reported by the vehicle’s OBD system. These diagnostic trouble codes will help your technician diagnose and repair your vehicle.

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Vermont Department of Motor Vehicles
120 State Street
Montpelier, VT 05603-0001

Monday-Friday: 7:45am-4:30pm
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