RSC stands for "roll stability control" a problem has been detected with the anitlock brakes. The only way to know what has happened is the vehicle must be scanned for trouble code(s). the code will allow the technician to know where the fault lies. it could be a speed sensor, steering sensor or one of many other things. Be advised, until you have repaired and code cleared, the ABS or antilock brakes will not work.It will not affect the running of the vehicle in any way but no ABS/RSC