What is obd abs code P 63 and also still misfires after tune-up?

Hello, ABS codes will start with a "C". P63 is something I can't decipher. Make sure you are using a diagnostic tool with chassis code reading capabilities. If you have a misfire, and you have verified known good plugs, cap, rotor and wires, you'll want to check for proper fuel injector operation and also base engine compression. You could have a cylinder with an issue, either in the block or cylinder head(s). What are all of your diagnostic trouble codes? Keep in mind, codes are just clues that need troubleshooting performed to get to the root of your problem.