Cruise Control problems of the 2010 Subaru Outback

While driving the check engine, cruise control, abs, and vehicle dynamics control lights all came on. I later learned that a bad O2 sensor was the cause. It was raining and when I applied the brakes moderately firmly due to another car stopping hard in front of me, my car's brakes locked up and I slid on the wet pavement. Fortunately no accident occurred. After replacing the 02 sensor, the lights went off. Weeks later the same lights came on again due to what turned out to be a bad gas cap. When it was replaced, the lights went out. Now the other 02 sensor is intermittently going out, and it triggers the same lights. However I have been very surprised to learn that when these lights are on, those systems are disabled. It is astounding that safety is intentionally removed from a car due to a loose gas cap or bad 02 sensor.

Sudden acceleration disabling the cruise control to slow down and then hitting the resume button caused the car to surge . The rpm increased from 2000 to 6000 rpm. This occurs whenever the set speed is 20mph greater than the current speed. The dealer could not correct this, claiming that the full acceleration is by design. Wide open throttle is not a good practice since it makes the car hard to control. What belongs on a race track not on a highway.