2010 with v-6 ETC light came on several times on the way home from Portland, Oregon today. Ounce it came on and the car took off and was well over 100MPH with no throttle control. Shut the car off and restart and it would run fine for awhile, start flashing and run horrid. Anyway checked the codes using the key when I got home. I have 2173 (high air flow) and 2299 (Brake and throttle position not compatible). Other than vacuum lines on the back of the intake what else will cause 2173?