Go buy an Actron 9135 code reader, it'll read and reset any codes. You can find them on Ebay for under $100 or any Autoparts store would have one for under $150. The Actron 9145 is a little more capable scanner but costs a little more. They're actually made in the USA if you can believe that.
The OBDII socket is there by the left knee bolster under the dash. There's a fat head fastener you turn a quarter turn and the door pops open then the data port cap comes off and you plug in there, turn the key on and read the codes. Tell the scanner to erase them when you're done looking at 'em. I even saw that Walmart has the Innova 3100 for $98 today, they work just as well.