Clearing Diagnostic Trouble Codes

After testing and repairs have been completed, disconnect negative battery cable for at least 15 seconds to clear codes. A stored DTC will be cleared from ECM memory if the same malfunction is not detected for 40 drive cycles. On Sonata, fuel system rich/lean or misfire DTCs will be cleared when engine operating conditions are the same as when DTC was first detected and original malfunction is not detected during 80 drive cycles.