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When a DTC is stored in ECM

WARNING: This page is about a different car, the 2012 Infiniti G25. However, it is still accessible from the selected car via links, so may be relevant.

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 raw.

Fig 1: Permanent DTC Status, MIL And Driving Patterns
G08451274Courtesy of NISSAN NORTH AMERICA, INC.