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Reasons Why Your European Automobile Failed the Emissions Test

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Your European beauty may need to pass an emissions test in order to be registered in Pennsylvania. If this is the case and it doesn’t make the grade, there are several reasons for the failed test results. The good news is all the common reasons why a vehicle fails an emissions test are fixable. The bad news is you have to get them fixed before you can take the emissions test a second time. Why would your European automobile fail an emissions test? For the following reasons says 610AutoHaus.

Dirty Oil

If you haven’t had your oil changed in a long time, it has more hydrocarbons in it than clean oil does and this can make your car fail the emissions test. The dirtier the oil, the dirtier the emissions output. An oil change before your emissions test is a good idea to help reduce the hydrocarbons in your exhaust.

Rich Air/Fuel Mixture

Too much gasoline in the air/fuel mixture generally indicates a problem with your vehicle’s mass airflow sensor or oxygen sensor. Both can cause your automobile to fail the emissions test. A rich air/fuel mixture can also affect your engine’s performance and gas mileage.

Worn Spark Plugs

If your spark plugs are worn or do not fire correctly, your emission output will increase. This happens because the combustion in the combustion chamber is off. When your vehicle isn’t firing correctly, i.e. the combustion does not complete its process, the engine produces more exhaust.

Loose Gas Cap

The gas cap seals the gas tank to prevent evaporation. If your gas cap is not sealed tightly, your vehicle will fail the emissions test. It could be something as simple as taking the cap off and screwing it on again. If the seal is broken, you can replace the gas cap without too much of a hit to your wallet.

Dirty Air Filter

It’s a good idea to change your vehicle’s air filter every 12,000 miles or once a year. If you don’t, the dirty filter can affect the airflow into your engine and prevent the car from passing the emissions test. This is a quick and easy maintenance job that costs very little, so keep a clean air filter in your car.

Check Engine Light

Finally, if your check engine light is on you won’t pass the emissions. It doesn’t matter if the light is on due to a malfunction or a real problem. Most of what has been listed above can cause the check engine light to come on, as can catalytic converter and electrical problems.

Call 610AutoHaus in Pottstown, PA, at 610-628-4271 if your European automobile failed its emissions. We’ll find out why and fix it.

Call 610AutoHaus at 610-427-4505 for an appointment today!

Photo by Zssp from Getty Images via Canva Pro
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