Loose Gas Cap and Check Engine Light: What to Check, How Long It Takes, and When to Diagnose Further
Yes, a loose, damaged, or missing fuel cap can trigger a Check Engine Light. The cap helps seal the fuel tank as part of the evaporative-emissions (EVAP) system, which is designed to contain fuel vapours. If the seal is not holding, the vehicle may detect an EVAP-system fault. However, a Check Engine Light does not… Read More: Loose Gas Cap and Check Engine Light: What to Check,… »