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Nissan Sentra B18 (2020-2025) Service Manual: P1148 Closed Loop Control

Dtc Description

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 does not operate even when Nissan Sentra vehicle is being driven in the specified condition

Diagnosis delay time

—

POSSIBLE CAUSE

  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)

  • A/F sensor 1

  • A/F sensor 1 heater

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

  1. CHECK DTC PRIORITY

    If DTC P1148 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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