A motor vehicle equipped with an internal combustion engine as a power source, the motor vehicle comprising: an evaporated fuel processing system that adsorbs evaporated fuel in a fuel tank, which stores a fuel to be supplied to the internal combustion engine, and introduces the adsorbed evaporated fuel into an air intake system of the internal combustion engine by means of a negative pressure in the air intake system, with a view to processing the evaporated fuel; a heating system that utilizes the internal combustion engine as a heat source to heat a passenger compartment; a low temperature state identification module that identifies whether the motor vehicle is in a preset specific low temperature state having a relatively low potential for evaporation of fuel; and a control module that, upon identification of a non-specific low temperature state by the low temperature state identification module, performs evaporated fuel processing acceleration control prior to negative pressure reduction control, and, upon identification of the specific low temperature state by the low temperature state identification module, performs the negative pressure reduction control prior to the evaporated fuel processing acceleration control, where the evaporated fuel processing acceleration control regulates operation of the internal combustion engine with setting a high level of the negative pressure in the air intake system for acceleration of the processing of the evaporated fuel by the evaporated fuel processing system, and the negative pressure reduction control regulates the operation of the internal combustion engine with setting a lower level of the negative pressure in the air intake system than the level of the negative pressure set in the evaporated fuel processing acceleration control. an evaporated fuel processing system that adsorbs evaporated fuel in a fuel tank, which stores a fuel to be supplied to the internal combustion engine, and introduces the adsorbed evaporated fuel into an air intake system of the internal combustion engine by means of a negative pressure in the air intake system, with a view to processing the evaporated fuel; a heating system that utilizes the internal combustion engine as a heat source to heat a passenger compartment; a low temperature state identification module that identifies whether the motor vehicle is in a preset specific low temperature state having a relatively low potential for evaporation of fuel; and a control module that, upon identification of a non-specific low temperature state by the low temperature state identification module, performs evaporated fuel processing acceleration control prior to negative pressure reduction control, and, upon identification of the specific low temperature state by the low temperature state identification module, performs the negative pressure reduction control prior to the evaporated fuel processing acceleration control, where the evaporated fuel processing acceleration control regulates operation of the internal combustion engine with setting a high level of the negative pressure in the air intake system for acceleration of the processing of the evaporated fuel by the evaporated fuel processing system, and the negative pressure reduction control regulates the operation of the internal combustion engine with setting a lower level of the negative pressure in the air intake system than the level of the negative pressure set in the evaporated fuel processing acceleration control.