The exhaust system serves two main purposes. First, it carries off carbon monoxide and other harmful gases produced by the engine. Second, it muffles engine noise. Have a mechanic check your exhaust system for leaks in order to minimize the chances of carbon monoxide poisoning. Carbon monoxide is odorless, very hard to detect, and it can kill. If your car is stuck in the snow and you have the engine and heater running, open a window slightly and clear snow away from the exhaust pipe.

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