For vehicles manufactured between 1996 and 2000, how many emissions monitors can be not ready for the vehicle to pass?

For vehicles manufactured between 1996 and 2000, the standard allows two emissions monitors to be not ready for the vehicle to pass the emissions test. This flexibility is provided because vehicles from this era may have certain monitors that do not complete their self-tests, which can happen due to various reasons such as recent repairs, battery disconnections, or driving patterns that do not allow the monitors to reset.

To ensure compliance with emissions regulations, it is essential that sufficient monitors are operational, as they play a crucial role in detecting and managing pollutants from the vehicle. While newer vehicles often have stricter requirements regarding monitor readiness, this specific guideline for vehicles from the 1996 to 2000 range recognizes the technology limitations and readiness issues associated with those models. The allowance of two not-ready monitors signifies an understanding of the transitional phase in automotive technology during that period.