Shift in the Demand Curve. A shift in the demand curve occurs when the whole demand curve moves to the right or left. For example, an increase in income would mean people can afford to buy more widgets even at the same price.
Once they fail they can do massive damage like I've described above. Clogged catalytic converters cause the engine to stop running all together, or at the very least you would notice that the engine would no longer rev or accelerate the vehicle (lack of power). Customer: replied 7 years ago.
CATALYTIC CONVERTER FAILURES: If your catalytic converter needs replacing, then it is highly probable that at least one of the six causes below has contributed to its failure. An Oxygen Sensor is Not Functioning Properly. An oxygen sensor failuring can lead to incorrect readings of exhaust gasses.