I can't tell what the problem is without knowing the nature of the fault code. It will be something related to emissions, not oil level, brakes, or anything like that. Since the engine is running ok, a likely suspect would be the emissions control system. Part of that system checks the fuel supply for leaks. A common cause of a leak is a loose gas cap. Besides that, it's impossible to guess until you find out what the code is.
Saturday, March 13th, 2010 AT 9:20 PM