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DTC P1148, P1168 CLOSED LOOP CONTROL EC-511 C D E F G H I J K L M A EC DTC P1148, P1168 CLOSED LOOP CONTROL PFP:22690 On Board Diagnosis Logic NBS002Y1 These self-diagnoses have the one trip detection logic. DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1148 Closed loop control The closed loop control function for bank 1 ● Harness or connectors ● A/F sensor 1 ● A/F sensor 1 heater P1168 The closed loop control function for bank 2 |