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What's involved in an emissions test?

Absolute Auto Repair Center • March 1, 2023

At Absolute Auto Repair Center, we understand that emissions testing can be a daunting task for many car owners. With several locations across Fitchburg, Shirley, and Gardner (West Street), we're here to help you through the process. In this article, we'll cover what's involved in an emissions test, so you know exactly what to expect when you bring your vehicle in for testing.



Why are emission tests done & what's involved?


An emissions test is conducted to measure the level of pollutants that are emitted from a vehicle's exhaust system. The test is mandatory in many states, including Massachusetts, and failure to comply can result in hefty fines or even registration suspension. Therefore, it's essential to understand what's involved in an emissions test and how to prepare your car for it.


During the emissions test, a certified technician will inspect your car's emission control system, including the exhaust gas recirculation (EGR) valve, catalytic converter, oxygen sensor, and evaporative emissions system. These parts play a crucial role in reducing harmful emissions and ensuring your car runs efficiently.


The technician will then hook up your vehicle to a diagnostic computer, which will scan for any fault codes in the onboard computer. Fault codes indicate a problem with the emission control system, and the technician will need to fix the issue before the car can pass the emissions test. If no fault codes are present, the technician will proceed with the actual emissions test.


The test involves placing a probe into the tailpipe to measure the level of pollutants emitted from your vehicle. The technician will also conduct a visual inspection of the exhaust system and check for any visible leaks or cracks that could affect emissions. If your car passes the emissions test, you'll receive a certificate of compliance. If it fails, the technician will explain the reason for failure and what needs to be fixed to pass the test.



How to prepare


To prepare your car for an emissions test, it's crucial to keep up with regular maintenance. This includes changing your oil and air filter as recommended by the manufacturer, ensuring your tires are properly inflated, and using the right fuel grade. It's also essential to address any warning lights or unusual sounds as soon as possible, as they could indicate a problem with your car's emission control system.


At Absolute Auto Repair Center, our certified technicians have the expertise and equipment to ensure your car is ready for the emissions test. We offer a range of services, including emissions testing, tune-ups, and engine repairs, to help keep your car running smoothly and efficiently. So, if you're due for an emissions test or need any other auto services, visit one of our locations in Fitchburg, Shirley, or Gardner (West Street) today.


Emissions testing is a crucial aspect of owning a vehicle in Massachusetts. It's essential to understand what's involved in an emissions test and how to prepare your car for it. Keeping up with regular maintenance and addressing any issues promptly can help ensure your car passes the test with flying colors. At Absolute Auto Repair Center, we're here to help you through the process, so you can drive with confidence knowing your car meets the state's emissions standards.

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