On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic  .

Fig 1: Identifying DTC P1148 & P1168 Conditions & Possible Causes

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

DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (A/F) sensor 1.

Perform the trouble diagnosis for the corresponding DTC.