I threw 4 codes. P1687 p0460 p1693 p1694. All circuit malfunctions. Ones for like oil metering one for gas gauge and the two I really want to fix are the 1693 and 1694. Ones for turbo control and turbo relief. PLEASE HELP FIX:/ one or all of them. And my brake light and and light is on. Any help to solve is appreciated