Subaru 2009 IMPREZA Service Manual page 428

(3)
(1)
(1) Front oxygen (A/F) sensor
(2) Rear oxygen sensor
(1) Fuel level sensor
(2) Fuel temperature sensor
Electrical Component Location
(2)
(3) Front catalytic converter
(3) Fuel tank pressure sensor
EN(H4SO)(diag)-11
(4)
(4) Rear catalytic converter
(1) (2) (3)
(4)
(4) Fuel sub level sensor
ENGINE (DIAGNOSTICS)
EN-03847
EN-06226