The Check Engine light is on because there is a fault code that has been set by the ECU. There is a problem with the emissions system. Seek professional help if you are not familiar with diagnosis of these codes.
The light should stay on whenever the key is on and the engine is off.
Yes. Your Check Engine light or Service Engine Soon light.
No
why does my check engine light stay on and want go off
The engine light will not go off tell you fixed the cause of the engine light and erased the code that set it off.
have vehicle scanned to determine the problem
Auto Zone will check your engine codes for FREE. They will tell exactly what is causing your engine light to stay on. They may even reset it for you.
To turn off the check engine light on a 1999 Toyota Camry you can disconnect the battery. This will only reset the check engine light. So if there is a persistant problem with the engine, the light is likely going to stay on. To turn off the check engine light on a 1999 Toyota Camry you can disconnect the battery. This will only reset the check engine light. So if there is a persistant problem with the engine, the light is likely going to stay on.
A malfunctioning sensor can cause the service engine light to stay on. A glitch in the computer can also cause the light to stay on.
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.
have vehicle scanned to determine the problem
Because you removed the computer.