Subaru Legacy 2005 Service Manual page 1847

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
5
CHECK EXHAUST SYSTEM.
Check exhaust system parts.
NOTE:
Check the following items.
• Loose part and incomplete installation of
exhaust system
• 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 any fault in exhaust
system?
EN(H6DO)(diag)-151
ENGINE (DIAGNOSTICS)
Yes
Repair or replace
Replace the rear
faulty parts.
oxygen sensor.
<Ref. to
FU(H6DO)-32,
Rear Oxygen Sen-
sor.>
No

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