Use a code scanner to test it. The light just says that something is going on that it wants you to look at. It could be as simple as a fluid level or it could be a misfire indicator or other problem. You can't know until you look at the codes.
You can borrow, rent or buy a code scanner at most auto parts retailers.
There are way to many to give a total list. Please specify as to which ones you are interested.
4444
The 93 Caprice could be losing fuel pressure. Check the fuel filter and the pressure to see if the pump could be bad.
If there is no light at all in whole dash. first check the fuse second check the headlight control switch.
Check the brake light switch on the brake pedal. Might have to replace it.
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions.
check your e brake
In the computer. If check engine light is on you can get them by plugging a reader into port under dash,.
First check the brake light fuse, if good, then test the brake light switch.
P0300 is a random cylinder misfire. Ensure engine is properly tuned.
The check engine light can be caused by many different things. Auto parts stores have a reader that can tell you exactly where the problem lies. Without that, it is difficult to determine the cause.
Possibly defective or misadjusted brake light switch.