Emission Control Systems

(1) Engine control module (ECM)
(2) Ignition coil
(3) Ignitor
(4) Crankshaft position sensor
(5) Camshaft position sensor
(6) Throttle position sensor
(7) Fuel injectors
(8) Pressure regulator
(9) Engine coolant temperature sensor
(10) Mass air flow sensor
(11) Idle air control solenoid valve
(12) Purge control solenoid valve
(13) Fuel pump
(14) PCV valve
(15) Air cleaner
(16) Canister
(17) Main relay
(18) Fuel pump relay
(19) Fuel filter
(20) Front catalytic converter
(21) Rear catalytic converter
(22) EGR valve
(23) EGR control solenoid valve
(24) Radiator fan
(25) Radiator fan relay
(26) Pressure sources switching solenoid valve
(27) Front oxygen sensor
(28) Rear oxygen sensor (Except California spec. vehicles)
(29) Pressure sensor
(30) A/C compressor (With A/C models)
(31) Inhibitor switch (AT vehicles only)
(32) Neutral position switch (MT vehicles only)
(33) CHECK ENGINE malfunction indicator lamp (MIL)
(34) Tachometer
(35) A/C relay (With A/C models)
(36) A/C control module (With A/C models)
(37) Ignition switch
(38) Transmission control module (TCM) (AT vehicles only)
(39) Vehicle speed sensor
(40) Data link connector (For Subaru select monitor and OBD-II general scan tool)
(41) Rear oxygen sensor (California spec. vehicles)
(42) Knock sensor
(43) Back-pressure transducer
(44) Filter
(45) Fuel tank pressure sensor
(46) Pressure control solenoid valve
(47) Fuel temperature sensor
(48) Fuel level sensor
(49) Vent control solenoid valve
(50) Air filter