Code p0139. o2 sensor replacement for honda accord 2003-2007 Fixing p0139 cel after downpipe install Forum fixing downpipe cel 0l install after civicx wire so slack sensor o2 partially ll left much also there add
Fixing P0139 CEL after Downpipe Install - 2.0L | 2016+ Honda Civic
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25 code p0496 diagnostic procedure
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Fixing P0139 CEL after Downpipe Install - 2.0L | 2016+ Honda Civic
CODE P0139. O2 SENSOR REPLACEMENT FOR HONDA ACCORD 2003-2007 - YouTube
p0139 help - HondaCivicForum.com