Nissan Murano: Dtc/circuit Diagnosis / P1148 Closed Loop Control

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P1148 Closed Loop Control

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P1148

CLOSED LOOP-B1

(Closed loop bank 1) 		Diagnosis condition —
Signal (terminal) —
Threshold The closed loop control function for bank 1 does not operate even when Nissan Murano vehicle is being driven in the specified condition
Diagnosis delay time —
P1168

CLOSED LOOP-B2

(Closed loop bank 2) 		Diagnosis condition —
Signal (terminal) —
Threshold The closed loop control function for bank 2 does not operate even when Nissan Murano vehicle is being driven in the specified condition
Diagnosis delay time —

POSSIBLE CAUSE

  • Harness or connectors

    (The A/F sensor 1 circuit is open or shorted.)

  • A/F sensor 1

  • A/F sensor 1 heater

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1, perform the trouble diagnosis for the corresponding DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

INSPECTION END

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