What Prevents a Car from Passing Emissions Testing?

What Prevents a Car from Passing Emissions Testing?

What Prevents a Car from Passing Emissions Testing?Nearly all cars need to go through emissions testing every in order to remain legally registered. If you have ever had a car fail an emissions test you understand that it can be a troublesome situation since you will be required to take an often unexpected trip to the mechanic in an effort to have the issue diagnosed and repaired. Luckily, some of the most common problems related to emissions test failure are relatively inexpensive to fix. These are four of the most common reasons a vehicle will fail an emissions test.

Failed EVAP

The Evaporative Emission Control System, also known as EVAP, is designed to prevent the release of gas fumes into the atmosphere. This system may malfunction if a leak occurs in a vacuum hose or vents or if the gas cap is cracked or loose.

Faulty O2 Sensor

If an oxygen sensor fails in a vehicle it will not be able to properly measure the exhaust for oxygen, which could result in several problems that include overheating, decrease of engine power, excessive gas use and slow acceleration. However, what is important to the licensing agency is that this problem increases the toxicity of your car's emissions. It is important to note that an o2 sensor may malfunction if there is an exhaust leak, which can be very bad for you and your car.

Rich Fuel Mix

When measuring the emissions of your vehicle for pollutants it may be found that there is a high level of carbon monoxide. This will occur if your car is burning excessive levels of fuel, meaning it is running rich. This may happen due to a of a faulty mass air flow sensor, o2 sensor or because of leaky fuel injectors.

Incorrect Fuel Metering

As you drive, your vehicle monitors how much fuel is it using to make sure that there is a correct air/fuel mixture for a proper running engine. The fuel monitoring may be out of spec if the computerized engine control or fuel injection unit fails, resulting in increased hazardous emissions.

If your car has failed an emissions test in Lake City, Georgia head to Clayton Auto Service. Our team offers professional emissions repairs in Lake City for all makes and models. To learn more about our Lake City auto repair shop and the services that we provide please don't hesitate to give us a call at (404) 341-6487. We'd be happy to answer any questions you may have.

Clayton Auto Service Blog

Written and Published By MORBiZ

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