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Nissan Sentra B18 (2020-2025) Service Manual: P1225 Tp Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P1225

CTP LEARNING-B1

(Closed throttle position learning bank 1)

Diagnosis condition

Ignition switch ON

Signal (terminal)

Electric throttle control actuator signal

Threshold

Closed throttle position learning value is excessively low

Diagnosis delay time

—

POSSIBLE CAUSE

Electric throttle control actuator (TP sensor 1 and 2)

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.

    2. Turn ignition switch ON.

    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION:

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

    >>

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE

    1. Turn ignition switch ON.

    2. Turn ignition switch OFF and wait at least 10 seconds.

    3. Turn ignition switch ON.

    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1 >>

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

    NO-2 >>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

    1. Turn ignition switch OFF.

    2. Remove the intake air duct. Refer to Removal and Installation.

    3. Check if foreign matter is caught between the throttle valve and the housing

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Work Procedure.

  2. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

    Replace electric throttle control actuator. Refer to Removal and Installation.

    >>

    INSPECTION END

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