Systems and methods for controlling operation of a vehicle system (102) are provided. This vehicle system (102) can be at least partially powered by electric current conducted to a collector device (112) of the vehicle system (102) from a conductive pathway (108) extending along a route (110) traveled by the vehicle system (102). A voltage level of the conductive pathway (108) may be monitored, and a conduction impaired location (114) of the conductive pathway (108) may be identified based at least in part on the voltage level of the conductive pathway (108) that is monitored. The collector device (112) or a removal device (220) may be controlled to remove a contaminant from the conductive pathway (108) at the conduction impaired location (114), the vehicle system (102) may be controlled to compensate for the conduction impaired location (114), and/or an off-board facility (122) and/or another vehicle system (102) may be notified of the conduction impaired location (114) responsive to identifying the conduction impaired location (114).