If your vehicle is registered in New Jersey, then you are aware of the vehicle emissions test required by the state. New Jersey mandates these tests to help reduce air pollution and ensure vehicles operate efficiently. But what does the test involve, and what happens if your vehicle fails? In this month’s blog post, we break down the testing process, common reasons for failure, and how a certified emissions repair facility can help you pass with confidence.
Why Is Emissions Testing Required?
New Jersey enforces emissions standards to minimize harmful pollutants released into the air. Excessive emissions contribute to poor air quality, respiratory issues, and environmental damage. To combat this, state regulations require periodic testing to ensure vehicles meet air quality standards set by the U.S. Environmental Protection Agency (EPA).
What Is Tested & How?
The emissions test evaluates your vehicle’s ability to control pollutant output. The process includes:
- Onboard Diagnostics (OBD) Inspection – Uses a scanner to check your vehicle’s emissions-related sensors.
- Tailpipe Emissions Test (for older models) – Measures levels of carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx).
- Visual Inspection – Ensures key emissions components, like the catalytic converter, are intact.
If any of these tests detect excessive emissions or faulty components, your vehicle fails and must be repaired before retesting.
Common Issues That Cause a Failed Test
Vehicles can fail emissions testing for various reasons, including:
- Check Engine Light On – Any active diagnostic trouble codes lead to an automatic failure.
- Faulty Oxygen Sensors – These sensors regulate fuel mixture; failure leads to excess emissions.
- Malfunctioning Catalytic Converter – This component reduces toxic gases; if damaged, pollutant levels rise.
- Exhaust System Leaks – Any leaks can cause inaccurate test readings.
- Dirty or Old Air Filters – A clogged air filter can affect fuel efficiency and emissions levels.
How a Registered Emissions Repair Facility Can Help
Failing an emissions test is not the end of the road—certified emissions repair professionals can diagnose and fix the problem. At a registered repair facility, technicians will:
- Scan for error codes using advanced diagnostics.
- Inspect and repair catalytic converters, oxygen sensors, exhaust leaks, and other emission-related issues.
- Ensure fuel efficiency and combustion are optimized.
- Perform post-repair testing to confirm compliance before retesting.
By maintaining your vehicle’s emissions system, you help protect the environment and ensure compliance with New Jersey’s air quality laws. If you have failed a test, a registered emissions repair facility can pinpoint the issue, make necessary repairs, and get you back on the road—legally and safely. Car Kings is a registered emissions repair facility – contact us today to schedule an inspection of your vehicle emissions system.