2000 Kia Sophia Check Engine Light

This is a catch 22 question. The longer you leave it the more damage could be done. Take the car to a good autoparts store (autozone etc.) Have them read the codes. Most on them do this free. Repost with the codes for a better diagnosis of the fault

ENGINE CONTROL MODULE (ECM)
The Engine Control Module (ECM), through various input sensors, monitors cranking signal, intake air amount, intake air temperature, air/fuel ratio, throttle valve opening angle, No. 1 piston compression stroke TDC, engine coolant temperature, engine RPM, vertical chassis movement, A/C operation, detonation, gear status (if automatic transmission/transaxle) and fuel tank pressure. ECM uses this information to control fuel injection timing and duration, ignition timing, idle speed, A/C cutout, fuel pump, purge control system and perform self-diagnostic functions.
ECM includes On Board Diagnostics-II (OBD-II) to monitor efficiency of emissions related components and systems. If an emissions related system malfunctions or deteriorates below preprogrammed performance criteria, OBD-II will illuminate the Malfunction Indicator Light (MIL) and store a Diagnostic Trouble Code (DTC). If a condition exists that may cause catalytic converter damage, MIL will flash continuously.