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The evap canister, also called the purge valve, in the 2001 Nissan Frontier can be found on the left side of the driver firewall next to the brake booster and master cylinder. This canister contains activated charcoal to capture emissions from your vehicle, making it more eco-friendly and safe for occupants. A malfunctioning canister could lead to a fuel odor or a sulfur-like smell in the car, which is harmful to inhale and could cause the vehicle to fail emissions testing, resulting in possible fines. If you detect these odors or receive an error code, it's crucial to bring your car to a mechanic for inspection.
For the 2001 Nissan Frontier, you can find the EGR valve situated between the exhaust and intake manifolds.