If a vehicle fails the OBD test, the vehicle operator is provided with a test report that specifies the reason for the failure. Vehicles that fail the OBD inspection test must be repaired and retested in order to obtain a valid vehicle inspection sticker. Some repairs may be covered under the vehicle's warranty. Depending on the model year and mileage of your vehicle, emission system repairs may be covered by the manufacturer. Federal law requires that the emission control systems on 1995 and newer model year vehicles be warranted for a minimum of 2 years or 24,000 miles.
Many automakers provide extended warranty coverage beyond that required by law.
Most inspection stations will be equipped and able to conduct the required annual OBD system check. However, only qualified, trained technicians equipped with the correct diagnostic and repair equipment should perform related service. Vehicle owners should ask at their repair facility if the technicians have received proper training, and have access to the necessary equipment to properly service OBD equipped vehicles.