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It is not supposed to be on when engine is running unless there is a problem.
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.
is not electrical,is from fuel shutoff is why
Has it always been like this or not? If it is, then it is not really a problem. It is how the stereo was installed. An stereo can be installed to be turned on whether the engine is on or off. If the stereo cannot be turned off at all, then you have a problem with your stereo.
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.
Owners manual Page 68: If the engine continues to run after the ignition key is turned off, open the hood and push down on the lever marked ¨Stop¨until the engine stops running. Using a pen or a screwdriver or a pen should make it easier to push the stop lever down. This makes the engine choke.
Scan tool, will give you a trouble code as to why the computer turned the check engine light on.
my 1993 mercedes-benz has a radio that when it is turned on reads holdhow do i enter codes
cuz the engine gets to hot and even it's turned off it still needs to cool down so the fan keeps running to cool it and if u take a look at about half an hour after you turn the engine off you'll notice that it's off as it has cooled the engine :)
check the battery and connections/cables
You need to use the instrument panel in the car to check the oil internally when your engine is turned off. This will tell you if you are ok or not.
it might be your throttle