What is the maximum allowable CO level for 1996 vehicles during a Smog Check?

The maximum allowable carbon monoxide (CO) level for 1996 model year vehicles during a Smog Check is indeed 0.5%. This standard is established to ensure that vehicles maintain acceptable emissions levels to protect air quality. Carbon monoxide is a colorless, odorless gas that can be harmful to human health and contributes to environmental pollution.

By setting the limit at 0.5%, California aims to reduce the amount of CO emitted from vehicles and promote cleaner air. This regulation reflects the efforts to implement stricter emissions controls as vehicle technology has evolved. Older vehicles may have more lenient standards, but for 1996 models and newer, the 0.5% threshold is set to help mitigate air quality issues associated with vehicle emissions.