ABS/TRACS: If the system can't tell what the brake pedal is doing then I think that would be enough to set the code and turn on the light. You'll know when you replace that switch!
My car throws the 232 code from time to time. I just clear it and move on. I sure wouldn't be replacing the O2 sensor until resolving the other gross and obvious issues. You won't know what's really going on with those codes until you get the intake and turbo plumbing buttoned up. It sure sounds like someone had it apart and didn't take the time to put it back together properly. I've never owned a turbo but the hose from the grill sounds like the intake hose between the turbo and the intercooler. The Turbo box is the airbox (which holds the air filter)? Make sure you get all the hose end clamps too.
Best of luck,
Will
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850 / 240 / Mini
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