Nissan Sentra B18 (2020-2025) Service Manual: P0201 Fuel Injector

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0201 Fuel Injector

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0201	INJECTOR CIRC-CYL1	Diagnosis condition	Engine running at idle
		Signal (terminal)	No. 1 fuel injector signal
		Threshold	ECM detects No. 1 injector circuit is open or shorted
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (The fuel injector circuit is open or shorted.)
Fuel injector
ECM

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. Note: ECM does not control the accelerator pedal releasing speed.
Device fix mode		This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

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 turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start the engine and let it idle for at least 30 seconds.
3. 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 FUEL INJECTOR

Refer to Component Function Check.

Is inspection result normal?
YES >>
INSPECTION END
NO >>
Repair or replace malfunctioning part.

P01f0 Engine Coolant Temperature

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

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