Why is the check engine light on a 2002 Chevy impala on?
Your engine light is designed to come on when it detects a
problem. Usually it comes on in the very early stages of a problem
so that you can reslove the issue before it becomes more costly.
The best thing to do is take it to a certified mancanic such as a
local dealership and ask them for a check engine diagnostic. They
will check the engine code using a diagnostic tool which is plugged
into your OBD 2 system that will tell them exactly why the light is
on. Since you have a fairly new car the light could tell them any
thing from a engine misfire to a malfunction in your transmission.
At any rate don't be to alarmed, just have it checked out as soon
as you can.