Subaru LEGACY 2006 Manual page 590

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Diagnostic Trouble Code (DTC) Detecting Criteria
BR:DTC P0463 FUEL LEVEL SENSOR "A" CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of fuel level sensor. Judge as NG if it is out of specification.
2. COMPONENT DESCRIPTION
(1)
(1) Engine control module (ECM)
(2) Fuel level sensor
3. ENABLE CONDITION
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(4)
(2)
(3) Fuel sub level sensor
Enable Conditions
GD(H4SO)-153
GENERAL DESCRIPTION
(3)
EN-01735
(4) Detecting circuit