The customer replaced his own front brake pads and rotors. Afterwards he had several warning lights on in the dash and active code C05B0 for hydraulic leak in the system, reduced speed. Disconnecting the battery for several minutes did not help. Had to clear the code with a scan tool. To avoid this condition I'd recommend Disconnecting the battery while replacing the front brakes then applying the brake pedal several times to push the caliper pistons out against the brake pads. Now reconnect the battery.