The check engine light is a warning system in your vehicle and when it comes on the computer system in your vehicle is telling you it found a problem in your vehicle.
A flashing check engine light often indicates a serious problem and should be looked at right away. This problem can range from a loose gas cap to a damaged catalytic converter.
Here in this article, I will explain the reason you may experience flashing check engine lights and then stops. Read here in case your check engine light on but car runs fine.
Why Is My Check Engine Light Flashing Then Stops
If you experience a check engine light flashing and then stopping suddenly while driving can be due to computer glitches. This is a failure from the computer to complete or properly perform its functions. The computer system in a vehicle has to rely on information it derives from a series of sensors that makes up the electronic control system.
Little errors can be detected by these sensors and sent to the computer system which would, in turn, throw on the check engine light to warn you. If this error is a false warning your vehicle’s computer may no longer detect this error, in the next tests it performs.
Flashing Check Engine Light Then Stops
If check engine light comes on and then suddenly turns off while driving, could have occurred due to a computer glitches. The car’s computer system is very sensitive and can detect little imperfections and get to warn you about them.
While you are driving your vehicle the computer is constantly running a couple of tests on your vehicle system. The computer performs an endless system of tests to see if there is anything wrong with your vehicle system. When the computer completes a test, it starts the process all over again to see if it finds a problem.
If the computer system detects this problem after a certain amount of test, of testing. The check engine light will come on for an error code for such a problem. The computer system will still keep testing and once it doesn’t detect this problem anymore. After testing for a while, it will turn back off the check engine light.
How To Fix Flashing Check Engine Light
Check Spark Plug
The spark plug ignites the air and fuel mixture by creating a spark enough to start your car engine. Overheating and carbon build-up reduces the lifespan of a spark plug. This can lead to a check engine light on your dashboard, your car engine taking a longer time to respond, decreased acceleration, and engine misfires. Ensure you regularly clean the spark plug and replace the damaged spark plug.
Faulty Ignition Coils
The Ignition coil is part of a car ignition system. It converts the voltage from the car battery to the required amount of volts enough to produce a spark by the spark plugs in igniting the air-fuel mixture.
A loose gas cap is one of the most common reasons your check engine light comes on. The gas cap prevents the build-up of dirt, debris, and dust from entering the gas tank by serving as a reliable protection seal. Due to the frequent removal of the gas cap whenever fuel is about to be added to the vehicle, it is often subjected to being worn out.
Error codes due to vapor leaks often originate in a gas cap that was either not tightened or was completely missing. Most times when you go to the gas station to get gas for your car, you have to take off the gas cap. Most people will leave their gas cap on the roof or top of the gas pump and drive off forgetting to replace it. Some other people do have a worn-out seal around their gas cap, which won’t seal their tank properly.
Check Cylinder Head
The cylinder head contains the inlet and exhaust valves, and spark plug. The symptoms of a worn or damaged cylinder head include overheating, poor engine performance, oil leaks, drop in coolant level, smoke, rough running, and misfiring which would all lead to blinking check engine lights.
If your vehicle is equipped with a temperature gauge you will see it begins to increase. The main cause of a cracked cylinder head is often engines overheating. This can lead to cracks in the cylinder head as a result of thermal stress when the engine gets too hot. Click here to read on easy fix & causes of engine overheating in cars.
Check Fuel Injectors
A fuel injection system provides the car engine with the correct amount of fuel under all the engine operating conditions. Fuel is injected into the engine through an injector by spraying fuel into the engine. While the Engine control unit (ECU) controls the amount of fuel to inject based on several sensor readings.
The electronic control unit (ECU) determines the amount of fuel to inject based on several sensor readings derived from the oxygen sensors, throttle position sensor, mass air flow sensor, and the engine coolant temperature sensor.
A bad fuel injector would lead to either too much or not enough fuel being delivered to the engine. This will cause blinking check engine light comes on which indicates a problem.
The piston is required for the operation of the car engine. The piston is located inside the cylinder, it connects to the crankshaft through the connecting rod. As the piston moves up and down the inlet valve opens and closes. When it moves downward, the piston rotates the crankshaft creating power to propel your vehicle.
Check Piston Rings
The piston rings help regulates oil pressure and the amount of oil consumed by the engine. The Pistons must form a tight seal against the cylinder walls to achieve complete and efficient combustion. The seal is created by a series of piston rings that envelop the piston. As the engine wears out over time, the piston rings and the seal also wears due to the movement of the piston.
A damaged or worn-out piston ring, would result in too much smoke produced from the exhaust pipes, excess oil consumption, poor acceleration, excessive oil intake, poor vehicle performance, and check engine light flashing.
Check Engine Light Flashing Then Stops Car Shaking
A flashing check engine light then stops requires extensive diagnosis and repair. If you experience flashing check engine light then stops. And your vehicle starts shaking may be caused by faulty spark plugs, poor fuel pressure, or engine misfire. A faulty spark plug and ignition coils are the most common reason you are experiencing a shaking car flashing check engine light then stops. The shaking is due to a misfire and your check engine light would come up for ignition error codes.
The issue of a flashing check engine light then stops and your car starts shaking or vibrating may be caused by things such as faulty spark plugs, poor fuel pressure, or misfires. A faulty idle air control valve may lead to the engine failing to maintain idle RPM and engine stalling which may to your vehicle shaking. Whenever your car engine misfires, this would also lead to your vehicle shaking issues.
The knock sensor detects irregular vibrations and sounds that occur within the engine block when the knock sensor is faulty it would fail to detect these irregular movements within the engine. If there is no balanced air-fuel ratio in the engine cylinder this can illuminate the check engine light and can trigger a shaking car.
To fix this issue properly diagnose your vehicle by using a scanner to get troubleshooting codes. Then check the spark plugs, check the ignition coils, and check the cylinder head and cylinder head gasket. Finally, check sensors that can cause the engine to misfire within the cylinder.
In conclusion, we have briefly explained why you can experience a flashing check engine light then stops. Computer glitches can’t be overlooked and are the main reason you may see a flashing check engine light then stops suddenly.