Whatever the cause, failure to get your Chevy vehicle checked out when the check engine light goes on could lead to further damage meaning costlier and more invasive repairs. First, make sure the replacement battery is the right type for your vehicle. You’re going to need some kind of diagnostic tool to access your engine’s computer. Virginia Gorg is a writer and self-published author. The problem can be a dirty, failed or failing mechanical component or one of many sensors. When you first notice the check engine light illuminate, pull over and check your gas cap is properly in place – this is especially likely to be the problem if the light comes on right after you fill up. At the auto repair shop, a mechanic will use a diagnostic computer or an electronic scan tool to pull the code that caused the light to come on in the first place. If your car isn’t feeling jerky or strange when the check engine light comes on, the first thing you should check is the gas cap. Vibration or shaking may be caused by misfires, poor fuel pressure, or faulty spark plugs. After looking at most of the possible codes or issues that could cause the check engine light to come on. Although your vehicle may seem to be operating fine, it's best to bring it in for service as soon as possible to prevent additional issues. The dreaded check engine light creates instant stress and panic, followed by the question — why is my check engine light on? There may be a few different vehicle issues that may cause your new Mazda CX-5 warning light, Mazda3 engine light, or your Mazda6 check engine light to go on. 1. If your check engine light flashes and then stabilizes when you start the engine, you need to turn off the engine immediately and check the spark plug wires, using the OBD code. An illuminated Check Engine Light can be caused by several different components. In this case, have your … Many of our customers will ask why their Check Engine Light is on. They also ask, “Is it safe to drive with an Engine Light On?” Well the answer to why your engine light is on, or as we call it, the “Check Engine Light,” is not so simple to answer. Your check engine light typically comes on when there is a problem with your emission control system or another computer-controlled system in your vehicle. The check engine light comes on and stays on if the onboard computer sees a problem that could cause an increase in emissions or a problem with its systems. Maybe it cost you a fortune. Most vehicle manufactures also have their OEM codes that some Readers and Scanners can't seem to read for lack of conversion ability. The check engine light is constantly on: Your vehicle's onboard diagnostic system has determined something is wrong and needs to be fixed. My Honda Civic's check engine light (MIL) keeps alerting me to P0300 Random Misfire codes. For car owners looking for the best, check out these seven common problems that might be the culprit. The mechanic will read the codes using a scanner, interpret the codes, and provide a diagnosis. The engine light can be triggered by a number of issues of varying degrees of severity. If your check engine light stays on after the wires are replaced, have your mechanic run an OBD. Check engine light information ; Writer Bio. Replacing the spark plugs and spark plug wires is all you need to fix this problem. References. That check engine light lets you know that something isn’t quite right with your car’s engine, but what is it that’s wrong? As its name suggests, carbon monoxide is converted into the safer carbon dioxide in this critical exhaust system part. Something triggered it, and ignoring the issue is sure to result in an even costlier repair. Then check that the vehicle is properly connected to the battery. I have tried multiple times to repair it but the light keeps coming on. As was mentioned, anything that could lead to an increase in tailpipe emissions has the potential to turn on the light. In order to put your mind at ease, or at least help you consider some potential causes, we’ve put together some of the common reasons why the Mazda check engine light is on in some vehicles. If you're unable to solve your check engine light problem on your own, don't let it slide. You may also need to manually reset the light after making repairs if the code doesn't clear automatically. And it’s getting on your nerves. Without accurate data, the ECM cannot precisely control fuel delivery and spark timing (and automatic transmission shifting). She is a grant writer as well and contributes articles to various websites. When the Check Engine Light is on, your car’s monitoring system will have "fault codes" that indicate the nature of the problem. So why is the light still on? The check engine light is part of your car’s so-called onboard diagnostics system. 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