Quite normal. The "Reporting System" must register a certain amount of failures before a "Code" is "Registered". What code is it throwing? Auto Zone, Schucke, Cragen,Orielly,Checker will "Pull" the "Codes for U if U don't have a reader. There are "Sensors" in the Wheels that often go bad for numerous reasons that will not effect Ur "Stopping Power", but until U "Pull the Codes" U won't know. By All Means, if it doesn't "Stop" right or "Feel" right, Park it! John