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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2413 (Engine Control System - DTCS P0643 To P2A03 (VQ40DE)) >> DTC P1148, P1168: Closed Loop Control >> On Board Diagnosis Logic

On Board Diagnosis Logic

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

These self-diagnoses have the one trip detection logic  .

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1148
1148 (Bank 1)
Closed loop control function The closed loop control function for bank 1 does not operate even when vehicle is being driven in the specified condition.
  • Harness or connectors [The air fuel ratio (A/F) sensor 1 circuit is open or shorted.]
  • Air fuel ratio (A/F) sensor 1
  • Air fuel ratio (A/F) sensor 1 heater
P1168
1168 (Bank 2)
The closed loop control function for bank 2 does not operate even when vehicle is being driven in the specified condition.

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.