What is the consequence of failing an emissions test?

Failing an emissions test typically necessitates repairs to the vehicle's emission control system. This is crucial because the goal of the emissions test is to ensure that vehicles meet state air quality standards and operate within permissible pollution levels. After the necessary repairs are made, the vehicle must undergo a retest to confirm that it now meets these standards. This process helps reduce harmful emissions that could negatively impact air quality and public health.

In contrast, some other choices suggest actions like impounding the vehicle or issuing immediate fines, which are generally not the standard protocol following a failed emissions test. Moreover, the idea of no consequence occurring runs counter to the purpose of emissions testing, which is to enforce environmental regulations. Thus, having to repair the vehicle and retest it is the established course of action following a failure in emissions testing.