Carbon monoxide is a colorless, tasteless, and odorless killer claiming hundreds of lives every year. Keyless ignitions and modern quiet running auto engines have exacerbated this problem. The auto makers haven't figured out a solution so we did. We have developed a patent pending poison prevention system to save lives - coCO (Carbon Monoxide Car Off). coCO prevents carbon monoxide poisoning by sensing rising levels within a vehicle’s cabin and / or within a garage, alerting the owner via smart device application alarms, and ultimately turning the engine off.