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Nissan Sentra B18 (2020-2025) Service Manual: P2768-00 Input Speed Sensor B

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P2768

00

Input/Turbine speed sensor B

(Input/Turbine Shaft Speed Sensor "B" Circuit Intermittent)

Diagnosis condition

Diagnosis is permitted when all of the following conditions are satisfied:

a) Ignition voltage ≥ 9.01 V

b) Battery voltage ≥ 9.01 V

Signal

Secondary speed sensor signal

Threshold

Secondary pulley speed > 11200 rpm

Diagnosis delay time

2 seconds

POSSIBLE CAUSE

  • Harness or connector

  • Secondary speed sensor

  • TCM

FAIL-SAFE

Not changed from normal driving

DTC CONFIRMATION PROCEDURE

  1. PREPARATION BEFORE WORK

    If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 10 V.

    >>

    GO TO 2.

  2. CHECK DTC DETECTION

    1. Start the engine.

    2. Drive the Nissan Sentra vehicle and maintain the following conditions for 10 seconds or more.

      Shift position

      : "D" position

      Nissan Sentra Vehicle speed

      : 80 km/h (49 MPH) or more

      CAUTION:

      Be careful of the driving speed.

    3. Stop the Nissan Sentra vehicle.

    4. Check the DTC.

    Is "P2768-00" detected?

    YES >>

    Proceed to Diagnosis Procedure.

    NO-1>>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2>>

    Confirmation after repair: INSPECTION END

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK SECONDARY SPEED SENSOR CIRCUIT

    Check secondary speed sensor circuit. Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES >>

    Replace TCM. Refer to Removal and Installation.

    NO >>

    Repair or replace damaged parts.

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