According to some possible implementations, a monitoring device may receive a set of inputs from one or more drivers of a device connected to a bus. The one or more drivers may be capable of driving a bus line of the bus, and the bus may connect multiple devices capable of driving the bus line. The monitoring device may determine a length of time over which the set of inputs maintains a value indicating that the bus is not idle. The monitoring device may compare the length of time and a threshold. The monitoring device may output a signal based on comparing the length of time and the threshold.