× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: PO455 AND P2178 CODES
Posted to Technical Discussion Forum on 6/29/2012

Assuming purge valve is properly working. You should smoke the EVAP system for leaks. If no leaks, gas cap was probably loose. Login to read more.