What could be the result of running a vehicle in the shop without proper ventilation?

Running a vehicle in a shop without proper ventilation can lead to the accumulation of toxic exhaust gases, particularly carbon monoxide, which is odorless and colorless but highly lethal. Prolonged exposure to these gases can cause serious health issues and potentially result in death due to asphyxiation or carbon monoxide poisoning. Proper ventilation is essential in automotive shops to ensure that any harmful gases released during engine operation are expelled from the enclosed space, safeguarding both the workers and customers.

While loud noises, vehicle overheating, and perceived inaction may occur for various reasons during vehicle operation, the critical danger posed by the lack of ventilation makes the risk of death the most significant concern in this situation.