Can Your Car Pass Emissions with the Check Engine Light On? A Mechanic Puts it to the Test

Guadalajara, Jalisco – A local mechanic, known as Mamá Mecanic, recently conducted an unconventional experiment at a vehicle verification center in Jalisco to address a common question among car owners: can a vehicle pass the mandatory emissions test with the "Check Engine" light illuminated? The mechanic intentionally drove her car to the verification appointment without performing prior maintenance, ensuring the "Check Engine" light was active. She meticulously documented the entire process, from scheduling the online appointment and completing necessary paperwork to the detailed inspection procedures at the center. Upon arrival, staff instructed her to exit the vehicle, leave it running, and remove any hood locks. The car then underwent a two-part examination: a visual and mechanical inspection, where technicians checked for fluid leaks and the presence of essential components, followed by a comprehensive gas emissions test. Despite her initial apprehension, the vehicle successfully passed both stages of the verification. Mamá Mecanic concluded that the presence of the "Check Engine" light does not automatically result in a failed inspection. She emphasized that the outcome largely depends on the underlying reason for the light's activation and, more importantly, whether the engine is operating efficiently, not leaking fluids, and equipped with a functional catalytic converter. She also noted the helpfulness of the center's staff and reminded viewers about the mandatory license plate change in Jalisco this year.