Depends on the car. Did you actually fix the problem or are you just hoping to turn out the light and it will fix itself?
With a scan tool, at a parts store (ie Autozone does it for free), or possibly by cycling ignition key on, off, on, off, on and counting the blinks.
If the light is not coming on when you turn on the ignition, check the bulb, it may be blown.
"Check Engine" light comes on when you turn ignition switch on and should go off when engine cranks.
Simply turn on the ignition but do not attempt to start the engine. If the light bulb is good you will see the Check Engine light illuminate and stay on. If you do not see the Check Engine light, the bulb is defective or has been removed.
If the check engine light is flashing when the engine is running , that indicates that an ignition misfire has been detected
A blinking check engine light means an ignition cylinder misfire has been detected
Yes, when you turn on the ignition the Check Engine light will come on for a few seconds to show you the light is working. It will go out if no problem is detected.
Turn on the ignition and look at the instruments. You will see the Check Engine Light come on for a few seconds and then go off. If you see the light it is working.
If your check engine light is blinking that means an ignition misfire has been detected
An ignition misfire has been detected
Do you mean the check engine light does not come on when you turn the ignition on? Possibly the bulb is burnt out.
When you turn the ignition key to the run position just before starting the vehicle the check engine light will light for a few seconds to check the bulb