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P0431 Diagnostic Trouble Code Discussion for February 2010

Warmup Catalyst System Efficiency Low (Bank 2)


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Trouble Ticket Help Requests for DTC P0431
Help Request Posted
2001 Mazda Millenia 2.5L MIL Lamp on VIN: JM1TA22141
P0431: Warmup Catalyst Efficiency Below Normal (Bank 2). ... emission for 2 codes in computer. p0421 and p0431 catalyst efficiency below threshold bank 1 and 2. plugged scanner in and found upstream and downstream were doing the same switching on both banks which tells me that the cats ar...
February 08, 2010
2001 Mazda Millenia 2.5L MIL Lamp on VIN: JM1TA22141
P0431: Warmup Catalyst Efficiency Below Normal (Bank 2). ... emission for 2 codes in computer. p0421 and p0431 catalyst efficiency below threshold bank 1 and 2. plugged scanner in and found upstream and downstream were doing the same switching on both banks which tells me that the cats ar...
February 08, 2010