It is normal if other lights come on at the same time. All of the reminder/warning lights should come on when ignition is in idle (key's in ignition, but the car is not running)
When a check engine light comes on, it means that there are issues with the engine. It gets turned off when the person resolves the problem that caused it to turn on.
It is not supposed to be on when engine is running unless there is a problem.
On most vehicles, after the problem is taken care of, the check engine light resets automatically after the ignition is turned off and then the engine is started again. If you have fixed one problem, a second problem probably exists.
When the ignition key is turned to the run position just before starting the vehicle the check engine light should illuminate for a few seconds to prove that the bulb works
The same way you turned it on
I believe it's normal. But Check Owner's Manual. If you do not have one. Check Related links below.
Use an OBD code scanner to find out why the computer has turned on the check engine light.
The "bulb check" feature of most cars work by all coming on momentarily as the key is turned to the "on" position before turning further to the start position, then go out if there are no problems after engine is started and running. Also on the "Check Engine" light will illuminate any time the key is in the "run" position but the engine is not running.
check your oil level?
No. Check oil only when engine is off.
Check your fuel pump.
If the check engine light is blinking that means an engine cylinder misfire has been detected