Skip the auto shop - Our mechanics make house calls

Q: Do All States Require Emissions Testing?

asked by on

Do all states require emissions testing?

A: The short answer is – yes, every state requ...

The short answer is – yes, every state requires emission testing. However, there can be a lot of variation from state to state and even within a state. All states require annual or biennial tests, but in many states, testing is limited to certain geographic areas. For example, in New Mexico only one county requires biennial testing, and only if the vehicle is registered in that county. In some states, only vehicles that fall within certain weight categories need to be tested, and vehicles built before a certain model year or older than a certain number of years are exempt. The type of test can also vary from something as simple as a visual inspection that all smog control equipment is in place on the vehicle, to a full engine OBD II function test and tail pipe emissions test with an exhaust gas analyzer. Emission testing is usually in conjunction with vehicle re-registration or resale. For best results, check with your state’s department of motor vehicles or air resources authority.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Can a Car's Exhaust Be Damaged By Bad Roads?

There are many obstacles that could damage a vehicle's exhaust. Road conditions aren’t always the best, and there are often potholes or debris from a falling truck that can damage the underside of your car. A big contributor to a...

Q: What does the malfunction indicator Warning Light mean?

The malfunction indicator Warning Light is on your instrument cluster. It illuminates when the On-Board Diagnostics-Second Generation (OBD II) system detects an issue. The OBD II system monitors your vehicle’s emissions. When the malfunction indicator Warning Light is illuminated, it...

Q: Is a Vehicle With a Bad Exhaust System Dangerous?

In most states in the USA, if you have an exhaust leak, you will fail that state’s annual safety inspection. The vehicle will then be rejected for safety due to exhaust gases such as NOx, carbon monoxide, and many other...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.