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SEF053V
SEF954S
Component Description
NFEC0977
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as
pressure increases. The EVAP control system pressure sensor is
not used to control the engine system. It is used only for on board
diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NFEC0978
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
EVAP SYS PRES I Ignition switch: ON Approx. 3.4V
On Board Diagnosis Logic
NFEC0980
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P0453
0453
EVAP control system
pressure sensor high
input
An excessively high voltage from the sensor is
sent to ECM.
I Harness or connectors
(The sensor circuit is open or
shorted.)
I EVAP control system pressure sensor
I EVAP canister vent control valve
I EVAP canister
I Water separator
I Rubber hose from EVAP canister vent
control valve to water separator
DTC P0453 EVAP SYSTEM PRESSURE SENSOR
Component Description
EC-396
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