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P0431

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P0431 OBD-II Trouble Code: P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)
P0431 means there is a failure in the catalytic converter due to too much or little fuel intake or contamination from engine oil.

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Question
i have 3 code on my car P0431, P0174, P0305
Noise in exhaust systems occurs due to leaks as well as internal failure of the baffles in the muffler or resonator. So, just because there are no leaks, doesn't mean the exhaust system will be noise free. An [engine/exhaust noise...

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