Posts Tagged: Secondary Air System Monitor

Secondary Air Readiness Monitor — What it does

Learn About Secondary Air and How the Secondary Air Readiness Monitor Works Secondary air systems are used to jump start a cold catalytic converter to get it up to operating temperature by pumping outside air into the exhaust to provide extra oxygen to the catalyst. It’s designed to cut down on cold start emissions. A catalytic converter must reach approximately 400° to 600°F in order to properly reduce emissions. When a cold engine is started, a large amount of fuel is unburned due to the “quench” effect of the cold … Read More