what is the first thing when we get check engine message?

[khandelwal]

what is the fist thing to check when we get a check engine message?

in driving the car i dont feel any difference but want to be sure that nothing has gone wrong.

[khandelwal]

a scan test is the first step.

[khandelwal]

The first thing I would do is to check the gas cap. There was a time where in the check kept on and after sometime of searching I noticed that the problem was that it wasn't tight enough.

[KiaDxb]

As getting a check engine message is in itself a warning that dont start the car and get a expert to get the car checked.

all the best and i hope that you resolve the problem