ck engine light then brake failure

What is your question?

93,000 miles; trnasmission hissing lately but mostly when cold. Recently ck engine light came on. Was still driving with no issues. Today, light still on, as I pressed the brakes to come to a stop, they went fully to the floor, and car did not stop. They worked very poorly the rest of the drive(I was one block away). I continued to pull in and ut of driveway to test, and the brakes barely work at this point. Any ideas? Concerned as it followed a few days after the ck engine light