Fail-Safe Mode

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

When the malfunction A or B is detected in the two consecutive trip, the ECM enters fail-safe mode and the MIL lights up.

When the malfunction C is detected even in the 1st trip, the ECM enters fail-safe mode and the MIL lights up.

Fig 1: Engine Operating Conditions Chart In Fail-Safe Mode

Courtesy of NISSAN MOTOR CO., U.S.A.