Nissan Altima persistent loose gas cap warning light causing check engine light issue on Nissan Altima

Some Nissan Altima owners report experiencing a persistent loose gas cap warning light that triggers the check engine light. This issue can disrupt the pressure balance in the fuel system, leading to reduced fuel pressure and the escape of fuel vapors. Common causes for the check engine light include not only a loose gas cap but also faulty oxygen sensors, catalytic converter issues, spark plug problems, mass airflow sensor malfunctions, engine vacuum leaks, and defective fuel injectors. If the check engine light illuminates, it serves as a warning that there is an issue that requires attention, potentially indicating problems with the engine or transmission. In many cases, simply tightening the gas cap can resolve the warning light; however, if the light persists, it is crucial for owners to have their vehicle inspected by a professional to identify any underlying issues to prevent further damage.