Why emission test fail

Luckily, this is a pretty simple fix—get an oil change! Over time, extreme weather and general wear and tear can leave a car in need of exhaust repairs. If you've noticed increased engine noise, decreased fuel efficiency, or vibrations in the driver's seat, gas pedal, or steering wheel, you could be experiencing symptoms of a damaged exhaust system.

Once the issue is diagnosed and fixed, your car will not only pass the emissions test, but you'll be enjoying a smoother, quieter ride and potentially better gas mileage. That sounds like a win for you, your passengers, and the environment. This one may seem like a no-brainer, but hear us out.

Have you ever had a friend who continued to drive their car without issue, despite the fact that their dashboard was lit up like a Christmas tree? Don't be that friend. If your check engine light is on, your car will immediately fail emissions.

No ifs, ands, or buts about it. The engine of your car is a complicated machine and a leak anywhere within it could throw everything out of whack. You are probably wondering just what the heck happened. These are six common reasons why a vehicle will fail emissions, and what can be done to fix it. You are past due for an oil change. When you delay an oil change, it could cause you to fail an emissions test. Clean oil contains fewer hydrocarbons and makes for a cleaner engine- which means a cleaner emissions output.

Or, you can ask one of the experts at Meridian Automotive. This problem is usually a result of a defective oxygen sensor or faulty injectors. So, if you fail emissions, have these components inspected and changed if necessary.

If you have ever failed an emissions test you know that it is a stressful situation, as it generally requires a trip to the mechanic. Fortunately, some of the most common issues related to emissions test failure are actually quite inexpensive to repair. It is important to have these problems corrected, not only because you'll need to in order to keep your car legal, but to ensure it is running at maximum efficiency. These are 4 of the most common reasons a car will fail an emissions test.

If your oxygen sensor malfunctions it can not properly monitor the exhaust and may cause additional problems such as overheating, loss of engine power or poor acceleration.

However, what is important to the licensing department is that it can also increase the toxicity of your emissions. What it means is that some fuel is evaporating out, somewhere in the system. Luckily, a common cause of this issue is a faulty or leaky gas cap.

Either way, it has to be addressed. Air filter problems will cause your engine to run less efficiently, which, as you might be able to guess, will result in the release of higher emissions. That will cause you to fail a test and it needs to be addressed.