The EPC light came on 2 weeks after replacing the battery, what could be wrong?

A jump start is not a good idea for this car, it has so many computers that you can erase some of the adaptions. An EPC light is caused by a fault condition in the electronic throttle body, but again, voltage surges from jump starting or really low battery can cause all kinds of problems. I would first deal with why the car needs a jump start. You either have a defective battery, ( yes some are faulty right off the shelf ), poor charging from your alternator or a power drain that kills your battery when the car is parked over night.