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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1148 To P2A03 (Qr25DE) >> DTC P1148, P1168 Closed Loop Control >> On Board Diagnosis Logic

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic  .

DTC DETECTING CONDITION CHART

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 [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.
NOTE: 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.
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