What is the best way to avoid the effects of carbon monoxide if stranded in snow?

Running the engine occasionally for about 5 minutes every hour is the best way to avoid the effects of carbon monoxide if you are stranded in snow. This approach allows the vehicle to provide warmth while minimizing the risk of carbon monoxide buildup inside the vehicle. By running the engine intermittently, you ensure that fresh air can circulate in the cabin when the engine is off, which reduces the concentration of carbon monoxide, a colorless and odorless gas that can be deadly in enclosed spaces.

Additionally, if the engine runs continuously, it increases the chance of carbon monoxide accumulation, especially if there are any issues with the exhaust system or if snow or ice obstructs the tailpipe, which can cause exhaust fumes to back up into the car. Opening the windows for air circulation may compromise the warmth inside the vehicle, which can be dangerous in extremely cold conditions. Continuously turning on the heater without allowing for fresh air circulation can lead to a similar risk of carbon monoxide exposure, so it is essential to follow the intermittent engine running strategy for safety and comfort.