No. A catalytic converter wont. If its a rear wheel drive, check your drive shaft. Front Wheel drive, CV Joints. Other than that worn steering. Exhaust wont cause this issue.
Yes
It could be objects shaking in the trunk or something loose on the rear license plate or a problem with the catalytic converter or exhaust pipes.
Catalytic converters do not rattle. If it does it will need to be replaced as it may block the exhaust. Loose heat shield?
No, but it will make a sucking type sound.
Yes, it can affect the oxygen sensors and catalytic converter.Yes, it can affect the oxygen sensors and catalytic converter.
A bad catalytic converter will cause a severely restricted exhaust system. You would notice a lack of power and performance from you vehicle and in cases of a completely blocked converter, the engine may not run.
Normally a blocked catalytic converter or a blocked exhaust will cause that problem. Back pressure, means the gasses cannot escape. thus causing the manifolds to glow.
Yes if it is totally clogged.
Probable cause is exhaust restriction, possible plugged catalytic converter.
Check the heat shield on the catalytic converter Check exhaust hangers
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.
Depending on the vehicle, it could damage the catalytic converter over time.