Hi, welcome to JustAnswer!. This is Ed.
First, we need to find out what code is stored and I believe you can retrieve it (or them) by using a code-read feature built into the car. When finished, codes should be displayed in the odometer window of the instrument cluster.
Hop in the car and insert your ignition key to the ignition.
Roll the key from off to on three times, leaving the key ON after the last cycle.
Don't crank the engine -- just cycle ON-OFF-ON-OFF-ON and stop.
Watch for code display, followed by "P-done" (or simply "done") in the instrument cluster.
Write all codes down verbatim and shoot 'em back to me and we'll sort it out.
If the code-read feature won't run for you, it will be necessary to make a date with a scan tool, which may be done at many major parts retailers like Autozone. Most stores will scan your car for free.
Check it out and we'll talk again in a bit.