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P0431 Diagnostic Trouble Code Discussion for April 2011

Warmup Catalyst System Efficiency Low (Bank 2)

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Trouble Ticket Help Requests for DTC P0431
Help Request Posted
2002 Kia Sedona LX 3.5L MIL Lamp on VIN: KNDUP13142
P0431: Main Catalyst Efficiency Deterioration (Bank 2). hello all. I have this Kia that is kicking the crap outta me. the code is for bank 2 catalytic converter. When I'm reading the o2 data, the bank 1 converter is definitely weak. The bank 2 converter readings will rise on initial start up to about 7-850 mV and h...
April 06, 2011