Faulty catalytic converter, or sensors in exhaust faulty
No, the catalytic converter has nothing whatsoever to do with your defrost system.
Yes, it can if faulty or missing.
A faulty muffler will not cause this but a clogged catalytic converter will.
Most likely a faulty gasket in the oil system, a faulty catalytic converter or a faulty component in the exhaust system.
loss of power.noise rattling from exhaust
Yes, a faulty catalytic converter can cause fuel consumption to raise. Replacing a known bad catalytic converter will help, but keep in mind, the catalytic converter usually does not fail on its own. converters are pretty tough, living their lives running at 2000+ degrese internally. I would check your EGR valve and EGR valve tube for blockage or carbon build up. a faulty or clogged EGR valve will overtime distroy a catalytic converter. second thing to check is your Oxygen Sensors. these sensors are the computers first reading of bad fuel mixture, if they are clogged with carbon, they can distroy your EGR valve, which inturn kills your converter.
yes but it would need to be a very serious flaw
Yes, it can cause damage to the O2 sensor and catalytic converter.
Answercatalytic converter efficiency below threshold.http://www.v8sho.com/SHO/TSB0197HO2SServiceTips.htm see web site for sensors locations, copy and paste website in address.....A code PO420, catalytic converter efficiency below threshold, is more likely an indication of a catalytic converter problem, not the sensor. There are different codes that would indicate a sensor problem. However, it is possible that a sensor problem may be the cause of the catalytic converter code appearing. The sensors (newer cars have two or more) measure the differences between exhaust gas before and after the converter(s). Faulty sensors could indicate a faulty converter when it might be the sensors' bad measurements that are the cause. However, a faulty sensor should also generate a bad sensor code. Sometimes another indicator of a bad catalytic converter might be a vibration in the exhaust system near the converter caused by pressure in the converter or a breakdown of the honeycomb material inside the converter.
the answer u are looking for . a stopped up catalytic converter will not let the engine 2 create a vacume that cause your problem . it needs air flow to breath p.s yes it can and will