Slash

I'm confused by having a 33 and a 34 at the same time..

33 says the Maf system's Signal Range is High... But 34 says the Maf system's Signal Range is Low... Doesn't that kind've contradict each-other? What does it mean if the car is running both of these codes simultaneously?

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43: It says its either Knock Sensor.. Or Electronic Spark Control Circuit Failure.. Now i know my Motor doesn't Knock.. So what should i look for here..
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44: Oxygen Sensor, Lean Exhaust... Does that mean my o2 sensor has gone bad? Or can Vacuum leaks cause this, and where should I look? Can my broken exhaust be a factor in this aswell?
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Background: The car pretty much has no exhaust ( Y-pipe was cut in half in an accident, haven't been able to fix it yet). Car has a cracked hose (Currently electrical taped up) Its the hose that runs from the Throttlebody to the Crank Case Vent (I think) in the passenger side Valve cover, would this cause a vacuum leak? I may have other vac leaks I'm unsure.. and need to find out how to look/find out if i do or not

Any help is greatly appreciated. I don't have much knowledge at all when it comes to working on cars, and even less when it comes to having wrench time. Try to make your answers easy for me to understand lol.. :x

Slash

bump.. you can't tell me no1 has any ideas..