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The canister purge valve, also known as the purge valve, on the 2002 Nissan Altima is situated above the back of the muffler. It is a crucial component in the EVAP system, responsible for clearing out the EVAP system by enabling vapor to enter the engine. A failing purge solenoid can lead to issues with the EVAP system, impacting the vehicle's emissions output. Signs of a faulty canister purge valve can include rough idling, as when the valve malfunctions and remains open, it can cause a vacuum leak affecting the engine's idle speed and performance.
The evap canister, also called the purge valve, is situated above the back of the muffler in the 2002 Nissan Altima.