It means the computer has detected a problem with the emissions controls. Have the computer scanned with an OBD2 scanner, for the trouble code to assist in diagnosing the problem. Do not ignore this light even if the engine seems to run fine. Damage to the O2 sensor or the catalytic converter may occur. My check engine light is on. It has to have the internal control module memory replaced. If you live where there is emission inspections and your van has less than 80,000 miles on it, it is covered by federal emissions law warranty.
That is the check engine light.
A flashing check engine light is an indication of a misfire.
Check engine light, see related question below.
go to autozone to ask to check your codes
The only proper way is with a scan tool.
No, the oil change reminder and the check engine light are unrelated.
Transmission, maybe. Check engine light
It would be very rare for a P1684 code to turn the light on.
try disconnecting battery for 15 minutes
No. It should not.
It might be that your pcv valve is plugged or the egr valve is sticking.
you need a scanner.there's many cheap "[obd2] scanners out there. or you can go to autozone and they scan it for free.