6 Proven Methods for Passing an Emissions (Smog) Test: Warm up Your Car’s Engine as Much as Possible. Use a Fuel Additive. Be Sure Your Tires Are Inflated to the High End of the Range. Change Your Oil Before Your Smog Check. If Your Check Engine Light Is On, Find a Way to Turn It off.
Your vehicle may fail the emissions test due to a rich air/fuel mixture. This problem is usually a result of a defective oxygen sensor or faulty injectors. You have a loose or leaking gas cap or it could be due to a faulty catalytic converter.
No, to pass an OBD-II emissions test the catalyst and EVAP monitors need time to run. If it’s not in a “ready” state, your vehicle will automatically fail. If you clear the ‘Check Engine’ light, or reset the OBD-II monitors right before your emissions test, your vehicle will not have time to enter Ready status and your vehicle will automatically fail the emissions test.
The Voluntary Vehicle Repair Program provides owners of eligible vehicles with financial assistance toward the cost of repairs after a failed emissions test. You can receive up to: $550 for gasoline vehicle repairs and $1000 for heavy duty diesel vehicle repairs.
Your vehicle may qualify for an Arizona Vehicle Emissions Testing exemption if the model year is within the past 5 model years. You can also avoid the emissions testing if your vehicle is registered outside of an Arizona vehicle control area.
The Emissions Testing Fee in Phoenix is $16 and in Tucson the fee is $12.25.
Your vehicle registration, the title, or bill of sale from the previous year, or the registration renewal application that you received in the mail or via email from the Motor Vehicles Division, and payment for the testing fee.
All residents in the greater Phoenix and Tucson areas are required to have their vehicles pass the emissions test for any vehicle that was made from 1967 or newer. Most vehicles newer than 6 years old are exempt from testing, and certain other vehicle exemptions may apply.