Why does your 2002 Lexus gs300 stall when the rpm drops to 0?

Your 2002 Lexus GS300 may stall when the RPM drops to 0 due to several potential issues, such as a faulty idle air control valve, a vacuum leak, or problems with the fuel delivery system. Additionally, issues with the ignition system, like worn spark plugs or a failing ignition coil, can also cause stalling. It's advisable to have the vehicle diagnosed by a mechanic to pinpoint the exact cause and ensure proper repairs are made.