Suzuki Vitara P Codes (Powertrain)

My Car Did Not Pass Emission And The Code Is #p0456 Mil Cmd And Also It Want Stay On When Putting It In Drive..what Is Wrong

I Own A 2001 Suzuki Grand Vitara 4x4, My Check Engine Light Came On This Morning. I Was Concerned To The Matter And Stopped By A Mechanic...

Hi, I Am Getting P0305. The Engine Vibrate Slightly At Idle, Once I Touch The Gas Pedal It Runs Fine, Accelaration And High Speed Are Fine...