A system for controlling a subsystem of a vehicle includes a memory, a first processor, and a second processor. The first processor allocates a portion of the memory upon booting to perform operations to control the subsystem and generates an indication when an amount of memory used from the allocated portion of the memory is greater than or equal to a threshold. The first processor monitors times when the vehicle is turned on and off and determines a time period during which the vehicle remains turned off. After the vehicle is turned off, the first processor enters a power save mode. The memory and the second processor continue to receive power. During the time period, on receiving the indication, the second processor wakes up the first processor, which performs a reboot operation, reallocates the memory, and reenters the power save mode. The memory continues to receive power.