03 Sequoia, ABS light, trac light and brake light on. Replaced Master cylinder. When pressing hard In the brake i am getting hard vibration, and the brakes will lock up. Trying to avoid spending 1000's of dollars to get this fixed. Would a fauty brake fluid pressure sensor cause this issue? AND can it be a DIY replacement? Don't know what to do. Already spent $380 to have the master cylinder replaced. Any suggestions would be greatly appreciated. Thank you mjbenatar