Nissan Sentra B18 (2020-2025) Service Manual: P0261 Fuel Injector (cylinder 1)

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0261 Fuel Injector (cylinder 1)

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0261	CYL1 INJECTOR (Cylinder 1 Injector A Circuit Low)	Diagnosis condition	—
		Signal (terminal)	—
		Threshold	Direct injector driver unit is malfunctioning.
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors
- direct fuel injector circuit is shorted
Battery power supply
ECM (direct injector driver unit)

FAIL-SAFE

Engine Control System

Not applicable

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

Confirmation Procedure

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 between 12 - 15 V at idle.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 20 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Refer 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

CHECK DIRECT FUEL INJECTOR

Check direct fuel injector. Refer to Component Inspection.

Is inspection result normal?
YES >>
GO TO 2.
NO >>
Repair or replace error-detected parts.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC confirmation procedure again. Refer to Confirmation Procedure.
4. Check 1st trip DTC.
Is the DTC P0261 displayed again?
YES >>
Replace ECM. Refer to ECM : Removal & Installation.
NO >>
INSPECTION END

P0262 Fuel Injector (cylinder 1)

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

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