Incredible Check Engine Light Still On After Fixing Problem Ideas. Gas cap issues can reduce fuel pressure and allow fuel vapors to escape, reducing fuel economy and increasing harmful emissions. Web you can always read your owner’s manual to explore why your check engine light might have come on.
A misfire can be caused by numerous problems, many of which can also lead to a flashing check engine light. Some check engine lights come on because the gas cap isn’t on tight enough. Web the check engine light indicates the presence of a malfunction with one of your engine system components or it could be a simple problem such as the loose gas caps.
