You're on the road, thinking about your own business, when out of nowhere an illuminated light appears in your dashboard. It could be the outline of an engine or possibly it has the words "check" or"check engine" on top of it. This is the check engine light - one of the most unwelcome images known to mankind. We have both good and bad news for you if you are in this scenario. The good news: Check engine lights don't necessarily mean that something is terribly incorrect with your vehicle. In reality an engine light could indicate that there is something seriously wrong with your car. Don't worry, we'll explain. Common reasons your check engine light may be inWith that in mind, let's look at the most frequent reasons that your check engine light might be on. 1. Engine issuesProblems with the engine can trigger the check engine light to blink. A control module monitors the engine's operation through a set of sensors. And when it detects a problem, it turns on the check engine light. 2. Transmission problemsYour car's transmission manipulates engine power before transferring it to drive wheels. Because the two assemblies work together so closely any issue with the transmission could increase tailpipe emissions. When the control module detects any problem with the transmission, it will illuminate the check engine indicator. 3. Emissions equipment problemsModern cars have a myriad of emission equipment that is on board. There's the exhaust gas recirculation systems, the catalytic converter, the evaporative emissions system - - the list goes on and on. Each piece of the puzzle is designed to reduce tailpipe emissions, thereby, protecting the environment and creating a more secure environment. We won't discuss the parts and systems separately because there are too many to mention. We can guarantee that a malfunctioning emission system is likely to cause a check engine light to come on. 4. Problems with modules and sensors (electronic Powertrain Controls)Today's powertrains are controlled by a array of sensors and components. The modules also have the ability to communicate over a large data network. Issues with sensors or modules, networks, and wiring can result in the check engine light. 5. Air/fuel delivery problemsFor your car to function properly, it needs both air and fuel. The control module can tell if the engine is getting too much or too low of either air or fuel. The check engine light is then switched on by the control module. 6. Issues caused by the ignition systemThe ignition system comprises the spark coil packs and plugs along with everything required to ignite the fuel/air mixture. The control module controls the functioning of the ignition system as you have probably already guessed. And it will turn on the check engine indicator if it finds a fault.
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