You have to scan to read the code, which will tell you what went wrong.
OP1. Ask dealer to scan the code, to find out what is wrong, see if it is under warranty, then decide if it should be repaired.
OP2. Buy a scanner yourself, on ebay, if this occurs very often.
OP3. disconnect the battery for seconds, and then reconnect, it will clear the Code and turn off the lamp. See if it will turn on in serval days. Most of the cases, it is a false signal.
I'm driving 2001 civic. Had this problem, the lamp will turn off after serval days.