Your dashboard is not trying to nag you, it is trying to keep you alive. Yet one of its most important warnings, the little amber “check engine” symbol, has become background noise for millions of ...

Melissa Horton is a financial literacy professional. She has 10+ years of experience in the financial services and planning industry. Robert Kelly is managing director of XTS Energy LLC, and has more ...

Carol M. Kopp edits features on a wide range of subjects for Investopedia, including investing, personal finance, retirement planning, taxes, business management, and career development. Khadija ...