This...actually happened to me, more or less (though the engine light never actually came on).
The death of the Lumina - it had been having transmission problems, but the mechanics I took it too kept saying that they "couldn't reproduce" the issue. Well, no, idjits, you didn't actually take it out at highway speeds like I told you to, did you? But no, it was much easier for them to not do their jobs and snicker at the silly female and her ladybrain who thought she knew something about cars.
So they flushed my transmission fluid to make it look like they were doing something.
Bad. Plan.
So, less than 5 minutes after commenting to my husband that I wasn't sure what I would do if my car died, I was accelerating onto the interstate. Then, from under the hood -
BANG!
ka-thunk, ka-thunk, ka-thunk
And that, my friends, is the sound a car makes when its transmission explodes.
So, the moral of the story is don't ever take your car to Firestone.