Lots of things can cause it, take it to autozone and they will scan it for free, post the codes back.
Could be time for a tuneup.
March, 22, 2008 AT 2:43 PM
When our Kia was new we had a problem with the sensor going off due to the fuel cap not being tightened at least 3 clicks.
Get your code read at the dealer and keep a paper copy for any warrenty work you may need. We had to replace our transmission just under 100, 00 miles. Most of the miles we drove were highway, free flowing too.