Control device and method for a vehicle having an idle stop function

The invention provides a control apparatus for a vehicle that prevents a driver a shock, vibration or the like undergoes by a relatively simple control when an engine start condition during the stoppage of a vehicle. In the stopped state of the vehicle when a Motorabstellzustand is satisfied, the engine is stopped and when after another engine start condition is satisfied when a start request, such as a battery remaining amount, driving a compressor of an air conditioner, is carried out a low-pressure control of a hydraulic pressure of a clutch, which establishes the power transmission between an engine and drive wheels and interrupts. At the start of the engine after a predetermined time, the low-pressure control is executed to transfer the clutch in a state immediately before the engagement. Thereafter, when the start request is issued by the driver, which is the hydraulic pressure in the state immediately before the engagement, due to the low-pressure control, it is possible to increase the hydraulic pressure to bring the clutch in immediate engagement.