Subaru IMPREZA 2004 Service Manual page 59
Engine section 1
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Also See for IMPREZA 2004:
- Service manual (796 pages) ,
- Owner's manual (491 pages) ,
- Quick reference manual (46 pages)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
5
CHECK EXHAUST SYSTEM.
Check exhaust system parts.
NOTE:
Check the following items.
•Loose installation of portions
•Damage (crack, hole etc.) of parts
•Looseness and ill fitting of parts between front
oxygen (A/F) sensor and rear oxygen sensor
Check
Is there a fault in exhaust sys-
tem?
EN(H4SO)(diag)-136
Yes
Repair or replace
Replace the rear
faulty parts.
oxygen sensor.
<Ref. to
FU(H4SO)-43,
Front Oxygen (A/
F) Sensor.>
No
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