The daunting “check engine” warning that shows up as a solid light on your dashboard might indicate a problem that’s easy to fix. The most recent CarMD Vehicle Health Index, which was released in April 2017, ranks the five most common repairs that are associated with the activation of the check-engine light.
Barry Bookman, who has worked in the automotive industry for 30 years as a technician for Chrysler, Ford, General Motors, Honda and Nissan, says the order in which the repairs are ranked in the index might change from year to year, but he expects those five to stay on the list. Bookman says he is surprised that “Loose Fuel Cap” isn’t ranked higher in the index, based on his experience. A loose fuel cap will cause the check-engine light to go on fairly quickly when the gas tank is one-third to two-thirds full.