On Board Diagnosis Logic

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

This diagnosis checks whether the engine coolant temperature is extraordinarily high, even when the load is not heavy.

When malfunction is detected, the Malfunction Indicator Lamp (MIL) will light up even in the first trip. See Fig 1.

Fig 1: Identifying On Board Diagnosis Logic For DTC P0217: Coolant Overtemperature Enrichment Protection (2.5L)

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