Check engine light doesn't always mean bad it also lets you know things like your a quart low on oil or antifreeze check those things
Does it run for a full minute or start then shut off within a few seconds?
If the latter, then it sounds like the anti-theft system has kicked in and needs to be reset.
SOURCE: 2002 sequioa sudden stall
Often when the battery is disconnected or replaced the computer will lose it's learned idle settings. You could try letting the engine idle in park until the engine temperature comes up to normal and leave it like that for a few minutes, then put the Air con on and let it idle again for a few minutes, then switch the air con off and put it into drive. If it does not stall, let it idle in drive for 2 minutes or so, and then do the same with the Air con on. This should relearn the base idle settings and stop it from stalling on you. Before you carry out this procedure you should make sure that when you replaced the battery you didn't remove any other plugs or knocked anything that may be causing the fault. If you try this procedure and it still stall when you select drive, you will need to get a Mechanic to check the vehicle over.
Hope this helps,
Mark.
SOURCE: Check Engine Light
check your mileage most systems require checks at 30 60 90 120 thousand miles it can be reset by almost any mech. when serviced
SOURCE: 2002 Corolla - Check Engine Light - small leak,
THE ONLY WAY TO CLEAR THE LIGHT IS WITH A SYSTEM SCAN TOOL OTHER THAN DISCONNECTING BATTERY
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