Nissan Sentra B18 (2020-2025) Service Manual: P0402 Egr System
Dtc Description
DTC Description
DTC DETECTION LOGIC
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P0402 |
EGRC-BPT VALVE (EGR A flow excessive detected) |
Diagnosis condition |
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Signal (terminal) |
— |
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Threshold |
When intake manifold pressure is threshold value or more |
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Diagnosis delay time |
5 second or more |
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POSSIBLE CAUSE
EGR volume control valve
FAIL-SAFE
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Engine operating condition in fail-safe mode |
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|---|---|---|
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Fail safe mode |
Nissan Sentra Vehicle behavior |
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Device fix mode |
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DTC Confirmation Procedure
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CHECK DTC PRIORITY
If DTC P0402 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?
YES >>Perform diagnosis of applicable. Refer to DTC Index.
NO >>GO TO 2.
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PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
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Turn ignition switch OFF and wait at least 10 seconds.
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Turn ignition switch ON.
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Turn ignition switch OFF and wait at least 10 seconds.
TEST CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>>GO TO 3.
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PERFORM DTC CONFIRMATION PROCEDURE
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Start engine and warm it up to normal operating temperature.
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Shift the selector lever to D range and wait at least for 1 minute at idle speed.
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Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>Refer to DTC Diagnosis Procedure.
NO >>INSPECTION END
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Dtc Diagnosis Procedure
DTC Diagnosis Procedure
-
CHECK DTC PRIORITY
If DTC P0402 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?
YES >>Perform diagnosis of applicable. Refer to DTC Index.
NO >>GO TO 2.
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CHECK EGR VOLUME CONTROL VALVE VISUALLY
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Remove the EGR volume control valve. Refer to Removal and Installation.
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Visually check the EGR volume control valve for cracks and damage.
Is the inspection result normal?
YES >>INSPECTION END
NO >>Replace EGR volume control valve. Refer to Removal and Installation.
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Other materials:
Cold weather driving
Freeing a frozen door lock
To help prevent the door locks of your Nissan Sentra from freezing in cold weather,
apply a suitable de-icing agent directly into the keyhole. If a lock does become
frozen, gently warm the mechanical key before inserting it into the keyhole. As
an alternative, use t ...
P052a Intake Valve Timing Control
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis
content)
DTC detecting
condition
...
Operation
Switch Name and Function
Switch Name and Function
STEERING SWITCH
The steering switch is located on the steering
wheel.
Transmits the steering switch signal to the
combination meter.
...