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www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-catalytic-converter

One of the first symptoms commonly associated with a bad or failing catalytic converter is a reduction in engine performance. The catalytic converter is built into the vehicle’s exhaust system, and as a result, can affect the performance of the engine if it develops any problems.

www.theglobeandmail.com/globe-drive/culture/commentary/if-i-dont-replace-a...

When the converter first starts showing signs of failure, it will not immediately affect the engine. ... If I don't replace a 'failing' catalytic converter right away, will it harm the engine ...

www.doityourself.com/stry/6-symptoms-of-a-failing-catalytic-converter

If you suspect you have a failing catalytic converter it is advisable to take your car to a mechanic and have them diagnose the problem. A catalytic converter is a vital part of the vehicle’s exhaust system that works to convert harm­ful gases into safe compounds that can be emitted into the atmosphere and cause less damage to the environment.

www.cars.com/articles/what-are-common-catalytic-converter-problems-1420663031608

Catalytic converters can overheat because of excessive amounts of unburned gas caused by a misfiring spark plug or a leaky exhaust valve. In addition, a failed oxygen sensor can cause overheating.

www.justanswer.com/nissan/28uch-clogged-catalytic-converter-cause-engine-fail.html

Can clogged catalytic converter cause engine to fail? Or other way around can engine cause the catalytic converter to fail? I have a Nissan 2002 frontier. Last Monday suddenly the start made a click noise. I thought it was low on oil, but I just changed the oil less than 10 days. So the tech said no you have lots of oil.

auto.howstuffworks.com/how-do-i-know-if-my-catalytic-converter-has-failed.htm

­To understand why a catalytic converter fails, you need to know how it works. The catalytic converter is part of the automobile exhaust system. It converts harm­ful compounds in exhaust into harmless compounds. In a typical passenger car, the catalytic converter, which resembles a muffler in shape, is between the engine and the muffler. It's ...

www.quora.com/What-happens-when-the-catalytic-converters-go-bad-on-a-car

We’ll answer this question the way it needs to be answered. COMPLETELY, so the readers can have a fuller understanding of the technology and its role and effects on the entire system of a gasoline engine. It is painfully obvious that very few peop...

www.answers.com/Q/What_happens_when_a_catalytic_converter_fails

What happens when a catalytic converter fails? When mine failed it plugged up so tight the car could not get enough air through the engine to run. With these new computer controlled engines, you ...

shop.advanceautoparts.com/r/diagnose-a-broken-catalytic-converter

On some older vehicles, a flashing check engine light will be your tipoff to catalytic converter overheating, and it shouldn't be ignored. Keep in mind that the catalytic converter could fail again in a short time if an underlying issue is not fixed. Keep your ride tuned up, and your cat will live longer. Common symptoms of failed catalytic ...

www.dummies.com/.../fuel-system/how-to-troubleshoot-catalytic-converters

The catalytic converter is a very important part of the emissions control system on your vehicle. It’s usually good for the life of a vehicle, but occasionally it does fail. The best thing you can do is be alert for signs of trouble and head for a service facility if you suspect that the catalytic converter is malfunctioning.