Let us spray. 1  When you're at the perfume counter, buying something smelly for your nearest and dearest this Christmas, just don't ask what's in it. 2  When you're at the perfume counter, buying something smelly for your nearest and dearest this Christmas, just don't ask what's in it. Hannah Betts argues you may get a nasty surprise.
Best Answer: When a catalytic converter goes bad it will restrict the flow of exhaust gases through the exhaust system. Basically, if the exhaust won't come out easily, air won't be taken into the engine easily to mix with the fuel to be burnt and give you power.
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.