Check engine light causing emissions test failure

Every year you are required to get a smog test on your vehicle in order to register it properly with the DMV in your name. Unless of coarse your vehicle is exempt to these regulations due to its age, which generally applies to vehicles made before 1970.

But what if your vehicle fails to pass an emissions test? We have all heard of people paying off the smog test attendant, but we strongly urge against this. First because it is illegal, second because it does not help you in the long run because you will fail your next emissions test as well.

Lets instead look at acceptable ways to help you pass the required emissions test and why your vehicle might be unable to pass it.

First of all, is your check engine light currently on? On any vehicle with a check engine light on there is no way for it to pass a smog test. This is because when the emissions test computer is connected to your vehicles ECU(computer) it can sense that this indicator is on and will by default cause you to fail the test. Generally the emissions computer will be able to tell the attendant why the check engine light is on. However, if it doesn’t there are places you can go that offer free ECC diagnostic services, such as Autozone.

A CEL(check engine light) being illuminated can be a number of things. Anything from a defective(or loose) gas cap to major engine problems. This depends if the CEL indicator is flashing or constantly on. A flashing CEL is most often a very serious issue and your vehicle should not be driven.

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