Nissan Rogue (T33) 2021-Present Service Manual: P2c91 Crankcase Ventilation System
DTC Description
DTC DETECTION LOGIC
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | ||
| P2C91 | 00 |
Crankcase Ventilation System - Hose "B" Disconnected (Crankcase Pressure Sensor "A" Circuit Low) |
Diagnosis condition |
|
| Signal (terminal) | - | |||
| Threshold | Crankcase pressure exceeds specified value | |||
| Diagnosis delay time | - | |||
POSSIBLE CAUSE
-
Harness or connectors
(Crankcase ventilation valve circuit is open or shorted.)
-
Blow-by hose (Fresh air hose, admission valve hose, and PCV valve hose)
-
PCV valve
-
Crankcase ventilation valve
-
Oil level gauge come off
-
Crankcase presser sensor
-
Intake system failure
(Manifold absolute pressure sensor, admission valve)
-
Oil filler cap come off
FAIL-SAFE
Not applicable
DTC Confirmation Procedure
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
-
Turn ignition switch OFF and wait at least 10 seconds.
-
Turn ignition switch ON.
-
Turn ignition switch OFF and wait at least 10 seconds.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
-
Start engine and warm it up to normal operating temperature.
-
Let it idle at least 60 seconds under the following condition.
-
A/C switch: OFF
-
Selector lever: N
-
-
Drive and accelerate the Nissan Ariya vehicle for 10 seconds under the following condition.
-
Engine speed: 1,800 - 1,900 rpm
CAUTION:
Always drive Nissan Ariya vehicle at a safe speed.
-
-
Check DTC.
Is 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
CHECK OIL LEVEL GAUGE
Check installation condition of oil level gauge.
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace error-detected parts.
CHECK BLOW-BY HOSE
Check blow-by hose (fresh air hose, admission valve hose, and PCV valve hose) for disconnected or damege.
Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace error-detected parts.
CHECK CRANKCASE, ROCKER COVER, AND FRONT COVER
Visually check crankcase, rocker cover, and front cover for damege.
Is the inspection result normal?
YES>>GO TO 4.
NO>>Replace the error-detected parts.
CHECK PCV VALVE
Check the PCV valve. Refer to POSITIVE CRANKCASE VENTILATION : Periodic Maintenance.
Is the inspection result normal?
YES>>GO TO 5.
NO>>Replace PCV valve. Refer to Exploded View.
CHECK CRANKCASE VENTILATION VALVE
Check crankcase ventilation valve. Refer to Diagnosis Procedure.
Is the inspection result normal?
YES>>GO TO 6.
NO>>Repair or replace error-detected parts.
CHECK CRANKCASE PRESSURE SENSOR
Check the crankcase pressure sensor. Refer toComponent Inspection.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace crankcase pressure sensor. Refer to Exploded View.
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DTC Description
DESCRIPTIONECM supplies a voltage of 5 V to some of the
sensors systematically divided into 3 groups, respectively.
Accordingly, when a short circuit develops in a sensor power source, a
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Diagnosis Procedure
CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
ABS actuator and electric unit (control u ...