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Home >> Infiniti >> 2004 >> QX56 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System >> DTC P1148, P1168: Closed Loop Control >> On Board Diagnosis Logic >> These self-diagnoses have the one trip detection logic.
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These self-diagnoses have the one trip detection logic.

Fig 1: DTC P1148, P1168 Closed Loop Control - On Board Diagnosis Logic
G02691631Courtesy 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.