Nope. How did you jump to a knock sensor? You already found the timing belt is not turning. No need to look at anything else.
There is a very small chance there has been no valve damage done. If the belt broke just as you were trying to start the engine, or as you said the engine stalled at idle, there is a tiny chance none of the valves were opened fully and got hit by a piston as it coasted to a stop. Turn the crankshaft by hand and turn the camshafts by hand to line up the timing marks, then install a new timing belt. If you encounter any resistance when turning one item, stop, back up just a little, then turn the other one. Alternate as necessary until everything is lined up, then install the new belt. If you get lucky, the engine will start and run, but expect it to have no compression and need to have the bent valves replaced.
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Wednesday, July 4th, 2012 AT 11:12 PM