Subaru 2009 IMPREZA Service Manual page 1724

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BP:DTC P0452 EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE
SENSOR LOW INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the fuel tank pressure sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
(A) Output voltage
(1) Connector
3. ENABLE CONDITIONS
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
(C)
(B) Input voltage
(2) Terminals
Enable Condition
GD(H4DOTC)-136
(2)
(A)
(B)
(C) To fuel tank
EN-03875