In one example, a method includes, transitioning, by an in-vehicle computing system and responsive to determining that a vehicle that includes the in-vehicle computing system is idle, into a maintenance mode during which the in-vehicle computing system is not likely to be accessed by an occupant of the vehicle; while operating in the maintenance mode, performing, by the in-vehicle computing system, one or more maintenance tasks; in response to determining that no maintenance tasks are scheduled or that performance of the one or more maintenance tasks are complete, transitioning, by the in-vehicle computing system, into a low-power mode, wherein the in-vehicle computing system consumes a greater amount of power when operating in the maintenance mode than when operating in the low-power mode; and periodically transitioning, by the in-vehicle computing system and from the low-power mode, into the maintenance mode to determine whether any new maintenance tasks are available.