Chevrolet Equinox check engine light on after refueling, no gas cap present on Chevrolet Equinox

Some Chevrolet Equinox owners report experiencing issues with the check engine light activating after refueling when no gas cap is present, indicating potential problems with the fuel system or emissions control system. These owners may notice fuel vapor leakage, which can trigger the check engine light, particularly if there are hissing sounds when opening the fuel tank or visible damage to the fuel filler neck. Additionally, the absence of a gas cap can lead to failures in the emission control system, affecting critical components such as oxygen sensors and catalytic converters. To resolve these issues, some owners find it necessary to replace the gas cap to ensure proper sealing and prevent further fuel vapor leakage. If the check engine light remains illuminated, it is recommended to have the vehicle inspected by a qualified mechanic to address any underlying concerns. Prompt attention to the check engine light is crucial to avoid potential damage and maintain optimal vehicle performance.