p0176 code reader

Asked by Nov 10, 2015 at 02:51 PM about the 2005 Pontiac Sunfire

Question type: Maintenance & Repair

diagnostic    code p0176 and p0496.  Are they related and what needs to be
repaired?

2 Answers

http://www.obd-codes.com/p0172 -running rich-too much fuel in fuel/air trim. P0496 - EVAP flow during non-purge condition. Yes, they are related. The EVAP is sucking fumes and possibly even fuel from tank in to intake at all times, when the purge valve should be closed

The purge valve is stuck open

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