When a DTC is stored in ECM

When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL shutoff if the same malfunction is not detected after performing the driving pattern for MIL shutoff three times in a row.

Fig 1: Identifying Driving Pattern, MIL Illumination & Permanent DTC Status

Courtesy of NISSAN NORTH AMERICA, INC.