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Home >> Infiniti >> 2012 >> FX35 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - DTCS P0441 Through P1168 >> DTC P1148, P1168: Closed Loop Control >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

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