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You are going to need to start out by having the faults scanned. Even if the check engine light is not on, you should have faults stored since the EPC light was on. You can get faults scanned at Autozone or any of the other large chain parts stores for FREE.
Since the EPC light came on, it is something related to the transfer of torque to the wheels- common issues are the Mass Air Flow sensor (MAF), the Engine Coolant Temp sensor (ECT) or it could be related to the Throttle Body, which can often get a lot of dirty carbon fouling right inside the butterfly valve and need to be cleaned out well and adapted.
If you get faults scanned, they should either be preceded by a "P" (P codes) or a 5 digit number. Post them up here and I can help you interpret and form a diagnostic plan.