2005 Toyota Prius abs code c1364, c1365

Hi I have a 2005 Toyota Prius with 63,118 miles. A couple days ago during a very rainy week here in Sacramento, I had to drive through a bit of a flooded road nothing much about 1/4 up the tires. I drove the car to the job everything was fine. Parked the car, everything fine. After work about 8 hours later I started the car and the emergency brake was on, even after depressed. Abs light, and brake warning light. After I came home I pulled the abs code c1364 malfunction in w/c pressure sensor and c1365. I cleared the codes and it drove it for a day and then then next day they were back. When I open the door the anti-theft alarm sound with the anti-theft sign on the dashboard. It also beeps when I press the brake pedal. If I clear the codes I can drive the car for a while.

Please help if you have any idea what's going on. I don't have warranty so I need to locate the problem and fix as low cost as possible. I have some mechanical experience so most of the work I can do myself.

 

63,000

 

If the codes arent cleared the emergency brake "LIGHT" even though it's released