These days, emission systems are controlled by an onboard computer which coordinates directly with the engine to ensure that your emissions are consistently within certain levels specified by worldwide standards. The warning device that will inform you if your vehicle is running outside of these parameters is the Check Engine Light.
Unless they have a specific exemption, emission testing is required for all vehicles before registration.
To ensure that everything is running smoothly, all vehicles must pass a regular emissions test. If your car fails this test, emissions repairs are required to fix the faults in order for it to pass. As long as your vehicle is tested within 60 days of the initial test, you won’t be charged to test it again.
Below are three of the most common issues that need to be repaired for your vehicle to pass an emissions test.
Excess unburned fuel inside the exhaust can damage your catalytic converter, whereas insufficient air causes a decrease in your fuel economy due to unburned fuel. So, oxygen sensors installed in the exhaust system are used to accurately measure your vehicle’s concentration of fuel to air ratio. These sensors can then send this data directly to your onboard computer which allows it to adjust the inbound mixture of fuel and air in real time.
The catalytic converter is another common emissions issue that may require repairs. Also, a part of your exhaust system, your car’s catalytic converter should always efficiently convert pollutants in the air such as carbon monoxide, unburned fuel, and nitrogen oxide into carbon dioxide, water, and nitrogen respectively.
Depending on the age of your vehicle, the control system for evaporative emissions should consist of various components that are used to prevent the release of hydrocarbons into our atmosphere. To ensure this system is working as it should, the fuel cap seal needs to be sealing effectively and the PCV valve should also be replaced when required, which is usually every 40,000 to 60,000 miles.
Emissions Repairs – Saving Your Car & The Planet
While this list is certainly not exhaustive (pun intended), it should give you an idea of the most common reasons why your vehicle would fail an emissions test. You should always be conscious of your car’s contribution to the pollution of our air, regardless of how old your car may be. Remember that not only are emissions repairs compulsory, they’re also helping to save both your vehicle and the environment.