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.

For on board diagnosis logic, see Fig 1.

Fig 1: Identifying On Board Diagnosis Logic For DTC P0031, DTC P0032, DTC P0051 Or DTC P0052: HO2S1 Heater

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