Clarksville, MD

12411 Clarksville Pike
(410) 531-6116

Columbia, MD

6810 Oak Hall Lane
(410) 381-1124

Gaithersburg, MD

19300 Woodfield Rd
(301) 963-0660

Clarksville, MD

12411 Clarksville Pike
(410) 531-6116

Columbia, MD

6810 Oak Hall Lane
(410) 381-1124

Gaithersburg, MD

19300 Woodfield Rd
(301) 963-0660

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What to Do if Your Car Fails an Emissions Test

February 24, 2015

You roll into the Maryland emissions testing facility early Saturday morning. Your emissions test notice is about to expire in a few days, so you need to get this done. You pull into the testing area, hand your paper to the technician, pay your fee… and your car fails the test. Now instead of grabbing a pancake breakfast at IHOP, you are stressing out about what to do next. Don’t be! At Hillmuth Automotive, we work on cars that failed emissions on a daily basis, and we can tell you that it’s not the end of the world. If you find yourself in this situation, just follow these steps and you will be fine!

Take Your VEIC to Your Maryland Mechanic

Whether your vehicle passes or fails, you will get a Vehicle Emissions Inspection Certificate (VEIC) and a diagnostics report. They will have some information about why and to what extent your car failed the test. Take this information along with your car to an auto repair shop that does emissions repair in Maryland. Don’t delay, because it’s in your best interest to complete the repair before the “valid through” date on the VEIC. This way you can re-test your car for free and avoid the late fees.

Get Your Car Re-Tested

Your Maryland auto repair shop will probably have the necessary equipment to test your vehicle on site. But to get the green light from the MVA, you have to go back to your local VEIP station for re-testing. If the time permits, allow a week or so after the repair is complete and before testing emissions again. This will ensure that your car’s on-board diagnostics monitors have enough time to reset themselves after any error codes have been cleared.

What if it Fails Again?

If you took your car to Hillmuth Automotive the first time, you don’t have to worry about failing the second test. But maybe you did some DIY repairs with the help of YouTube videos and it didn’t work—now what? If this happens, you can obtain a repair waiver. This document will allow you to drive for two years without having to pass emissions test. This should give you plenty of time to figure out what’s wrong. To qualify for the waiver, you need to have completed emissions repairs totaling at least $450 and have the receipts to show for it.

Why Did My Car Fail the Emissions Test?

Emissions test is designed to check the level of pollutants your car produces during fuel combustion. Depending on your car’s weight and manufacturing date, you may be subject to one or several of the following tests: gas cap test, on-board diagnostics and tailpipe test. These tests will show whether your vehicle’s emissions system is performing at its top efficiency and whether the emitted pollutants, such as carbon dioxide (CO2) and hydrocarbons (HC) are within the accepted standards.

There are several reasons your car might not pass the emissions test and they include things like:

  • faulty fuel metering controls
  • problems with the EVAP system
  • faulty oxygen sensor
  • worn-out or defective spark plugs
  • failing catalytic converter
  • leaks in vacuum hoses
  • defective air injection system
  • faulty gas cap

As you can see, many vehicles’ systems from fuel injection to the engine and exhaust have direct or indirect effect on the outcome of your emissions test. Essentially, every component that handles the fuel from the point of entry as liquid to the point of exit as gas could potentially malfunction or fail. If your check engine light is on, your vehicle will fail the emissions test—don’t even bother taking your car to the testing facility. Instead, bring it to your local Maryland auto repair shop and have the problem fixed ASAP.

If your car fails emissions out of the blue (which is how it usually happens), it’s not always a bad thing. You might have to go through the hassle of repair and re-testing, but at least you are now aware of the fact that your car is not performing efficiently. And because emissions problems often go back to the engine, you could be a few miles away from getting stranded in the middle of a highway.

If you are looking for emissions repair in Maryland, feel free to schedule an appointment at Hillmuth Automotive. We have four convenient locations in Clarksville, Columbia, Gaithersburg and Glenwood—give us a call.


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