most likely one of your two coils are bad
Cold
pontiac g6 check engine light car with wrench
Take it to a place that does free check engine light check. Some will reset it after they check it for you. Place in New York State are listed on http://NewYorkForum.us
If a check engine light is flashing that means an engine cylinder misfire has been detected
Check the brake fluid...
It is possible for the check engine light to come on in a Pontiac Transport when using ethanol gasoline because it burns hotter than other gasoline. The check engine light might also come on if the oxygen sensor is bad.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Have vehicle scanned to determine the problem
Something is wrong with the emissions system.
yes it can
The check engine light has nothing to do with an oil change. The check engine light is reset with a scan tool after repairing the failure that caused it.
Check the engine coolant... Is it full? yes coolant level is full