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SEF053V
SEF954S
Component Description
NFEC0779
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
NFEC0780
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
EVAP SYS PRES I Ignition switch: ON Approx. 3.4V
On Board Diagnosis Logic
NFEC0782
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P0452
0452
EVAP control system
pressure sensor low
input
An excessively low 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
DTC Confirmation Procedure
NFEC0784
NOTE:
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:
Always perform test at a temperature of 5°C (41°F) or more.
DTC P0452 EVAP SYSTEM PRESSURE SENSOR
Component Description
EC-390
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