Q: Do All States Require Emissions Testing?

asked by on November 25, 2015

Do all states require emissions testing?

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Strange rattling sound from the engine when RPM goes down from 3,000.

Hi there. The noise that you are hearing is heat shields on the exhaust system are loose causing a rattling noise. Either the shield on the manifolds are loose or the shields on the catalytic converter are loose. If you...

Why does my Nissan 300zx lose power?

Hello, we will be happy to help. I'm curious to know why the guy told you that you needed a new oxygen sensor and fuel pump. I wonder if the oxygen sensors were exhibiting that of lean conditions. If the...

How to fix or figure out exhaust system leak code P0402

I'm working on it.

Related articles

What Causes an Exhaust Manifold to Crack or Leak?
Your car has two manifolds – an intake manifold and an exhaust manifold. Both serve essential purposes, but the one most likely to...
Tips for Taking Care of Your Exhaust System
Your Your car’s exhaust system might not be the first thing you think about when it comes to engine performance or personal safety, but it should be pretty high on that list. Your engine combusts fuel and air in order...
Why Do Some Cars Have Really Smelly Exhaust Fumes?
Smelly car exhaust fumes mean that something is going wrong. It could be leaking fluids, a failing catalytic converter, or imbalanced air/fuel mix.