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P0431 Diagnostic Trouble Code Discussion for December 2009

Warmup Catalyst System Efficiency Low (Bank 2)

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Trouble Ticket Help Requests for DTC P0431
Help Request Posted
1999 Mitsubishi Montero 3.5L MIL Lamp on VIN: JA4MR51RXX
P0431: Warmup Catalyst Efficiency Low (Bank 2). Wow, my week for Montereos. Two here at the ame time. Customer complained of running rough,bogging out and wouldnt shift. Truck starts right up and sounds normal at idle, it will not accept any throttle, just bogs out like no fuel. Scanned and retrieved the ab...
December 09, 2009