When a malfunction occurs in an A-CPU among multiple CPUs, a retracting traveling control is performed to control a vehicle driving force with a CPU other than the A-CPU. During the retracting traveling control, a shift position is determined with a CPU other than the A-CPU according to an output signal of a shift sensor, and a reduction determination is performed to reduce a shift position, which is to be determined, to be less than a normal state. In this way, the shift position is determined and the retracting traveling is performed even during the retracting traveling control.