![]() It could be something generic, such as P0300, which doesn’t offer a lot of help unless there are other codes to put with it. You can plug in a compatible code scanner to read these codes. The computer sets a code that tells you what is wrong when the Check Engine Light comes on. Start by reading your service manual to get some advice tailored to your car.Īfter that, walk through the steps. Our team deals with these problems day in and day out, so we are well-versed in the fixes. To fix your flashing Check Engine Light like a professional, you must start to think as we do. How To Fix Your Check Engine Light Flashing And Car Shaking Low compression can be one of the most difficult problems to diagnose and repair. Different problems cause low compression, such as holes in a piston, a head gasket failure or leaky valves. It could be difficult to start the engine too. ![]() You will notice misfires plus decreased fuel economy. Without the right air density to mix with fuel, the performance and efficiency of the engine suffer. Low engine compression means that the cylinders can’t compress the right amount of air. RELATED: 15 Different Types of Sensors in a Car 6. Depending on how severe it is, the engine could misfire and the Check Engine Light may start to flash. If any one of the sensors fails, the operation of the engine suffers. Some sensors measure airflow, while others keep track of fuel pressure and engine timing. These sensors are responsible for monitoring engine operations and they make adjustments. Today’s car engines are equipped with a variety of sensors that keep everything running smoothly. If that’s not the problem, then it could also be a seal that’s worn out, allowing fuel to leak into the system. Additionally, hydrocarbon starts to build up on the tips because of fuel that’s left behind. The tip can get dirty, leading to a blockage. The fuel injectors must also work in a consistent spray pattern for efficient combustion.įuel injectors fail when they start leaking or they become blocked. There has to be an accurate amount of fuel being injected, which is controlled by the Electronic Control Unit (ECU). Bad fuel injectors create this type of problem.ĭirect injection systems ensure that fuel is delivered into each cylinder. If there’s not enough fuel, the engine struggles to run and it could misfire. Faulty Fuel Injectorįuel is needed in the combustion chamber to ensure smooth operation. RELATED: 6 Symptoms Of A Bad Spark Plug 4. For this reason, it’s best to replace the spark plugs at the recommended service intervals to avoid trouble. They get dirty and worn, leading to trouble creating the necessary spark to ignite the fuel-air mixture. Over time, spark plugs naturally become contaminated. You get a rough and shaky motor plus a Check Engine Light. When a spark plug stops operating, the cylinder it’s connected to can misfire. Spark plugs are also a common culprit, especially if they haven’t been changed in a long time. RELATED: 6 Symptoms Of A Bad Ignition Coil 3. Additionally, because the engine is working so hard, fuel economy suffers and you may have trouble starting the engine. When the ignition coils go bad, the engine doesn’t just misfire, but it also starts to idle rough and you’ll notice a decrease in power. The ignition coils act as small transformers designed to generate high voltage current to power the spark plugs. Ignition coils or coil packs commonly cause misfires and shaking. Any one of the remaining issues can lead to a misfiring engine. There’s something causing the misfire, which is what we will talk about in the next examples. With that said, a misfire isn’t the exact problem that needs to be fixed. It’s going to create a shaking feeling, and the Check Engine Light is sure to come on. A misfire can occur at engine startup while the vehicle is idling or in the middle of acceleration. In this situation, one cylinder will go unfired. ![]() With an engine misfire, the combustion reaction doesn’t complete normally. Let’s take a closer look at these causes. ![]() Most likely, there’s a misfire occurring, either from a bad ignition coil, a bad spark plug, a faulty fuel injector, a bad engine sensor, or low compression. It’s even more concerning when the car is shaking. When the Check Engine Light starts flashing, you know something serious is occurring. Reasons Your Check Engine Light Is Flashing And Car Is Shaking Plus, we’ve included some FAQs at the end of the article. Not only will you know the most common causes of this serious condition, but we also help you figure out how to fix it. How much more alarming is it when the light is flashing? Even worse, what does it mean if the Check Engine Light is flashing and the car is shaking? The Check Engine Light is made to get your attention even when it comes on the dashboard solid. ![]()
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