Emissions Testing & The Air Quality Check

The reason that Emissions Testing & The Air Quality Check is mandated by the state is for the health and safety of all Arizona residents and because in 1987 the federal government earmarked federal funds to states that work to reduce emissions. 

As these two areas continue to grow in population there is an increase in traffic which means higher emissions from additional vehicles.

Older vehicles need more maintenance to stay in good working condition and if they are not they often produce more emissions which lowers the air quality and can be unhealthy for those with respiratory problems.

What To Do If You Fail Your Vehicle Emissions Test

As your vehicle gets older it is likely that at some point you may fail the emissions test. Even if your vehicle is in great working order and you maintain it regularly things can still begin to deteriorate and you won’t always see a check engine light if there is a problem with your vehicle emissions. Sometimes you may have to get repairs made to your vehicle before you can retest and in some cases, these repairs can be expensive.

Voluntary Vehicle Repair Program

If you need assistance getting the repairs completed for your vehicle after you have failed the emissions test you can request help through the Voluntary Vehicle Repair Program. This program provides financial assistance for people that need help covering the cost of repairs but only after they have failed the Arizona Emissions Test.

You can receive up to $550 for a standard gasoline vehicle and up to $1000 for heavy-duty diesel vehicles that may need repairs to pass the retest. In most cases, the repairs do not tend to be very expensive but they must be completed at an ADEQ-approved facility. Now not just anyone can be approved for this program so be sure to check to see if you qualify. Here are a few reasons why you would qualify for the program.

  • Your vehicle has been registered in Maricopa or Pima County for at least the last 12 months and the registration has not lapsed by more than 60 days.
  • Your automobile is at least 12 years of age or older.
  • Your vehicle has failed the emissions test within 60 days before your registration expires.
  • It is not a motorhome, motorcycle, salvage vehicle, or a type of fleet vehicle.
  • The emission control system has not been tampered with, removed, or disabled in any way.
  • The owner has not participated in the program within the last 12 months.

What To Expect When You Come To Test Your Vehicle Emissions

  • Pull your car into the station, put it in the park, and apply your emergency brake. If your vehicle is a manual transmission, ensure you put it in neutral
  • Choose where you are most comfortable waiting for the test to be completed: the waiting booth, waiting area, or outside
  • While you are waiting the inspector performs the On-Board Diagnostic (OBD) test — without getting into your vehicle — the inspector reaches in to connect the OBD cord to the data link connector (DLC)
  • Once that is complete, you will be asked to return to your vehicle to turn the ignition key to the accessory position, so the inspector can verify the check engine light is functioning
  • You will then starts your vehicle, allowing the inspector to observe that the check engine light turns off from a safe distance
  • After the OBD test is complete, you will turn off the vehicle and exit to the waiting area of your choice (waiting booth, waiting area, or outside)
  • When payment is due, simply insert your credit card and remove it when processing is complete
  • You then return to your vehicle, and the inspector finishes the test process and delivers your vehicle information report, all while maintaining social distancing


This website is not affiliated with either ADEQ or MyAZCar.com. It is simply an additional Emissions Testing & The Air Quality Check resource for people who are trying to find the station closest to them. Please use the MyAZCar.com site to double-check that your chosen location is still open before driving there.