If the brake system problem light illuminates, however, there could be any number of problems within your braking system. The first thing to check is your brake fluid level. If you see that the level is low, adding more brake fluid to your car should fix the issue.
If your brake fluid is at a normal level, however, this warning light could indicate a serious issue. In this case, it’s a good idea to call your mechanic right away, since brake problems can be extremely dangerous if left unchecked!