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.

2.5L

For on board diagnosis logic (2.5L), see Fig 1.

Fig 1: Identifying On Board Diagnosis For DTC P0037 & DTC P0038: HO2S2 Heater (2.5L)

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

3.5L

For on board diagnosis logic (3.5L), see Fig 2.

Fig 2: Identifying On Board Diagnosis For DTC P0037, DTC P0038, P0057 & P0058: HO2S2 Heater (3.5L)

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