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P0431 Diagnostic Trouble Code Discussion for April 2013

Warmup Catalyst System Efficiency Low (Bank 2)


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Trouble Ticket Help Requests for DTC P0431
Help Request Posted
2001 Mitsubishi Eclipse Spyder GT 3.0L MIL Lamp on VIN: 4A3AE85HX1
P0431: Warmup Catalyst Efficiency Low (Bank 2). ... had both P0421 and P0431 codes. I performed a cat burnout...Removed 1 plug wire from each bank and ran engine at 3000rpm for 3 minutes. Both cat monitors completed and car went home. A pending P0431 came back. idles normally but sets a P0507 high rpm.
April 23, 2013
2001 Mitsubishi Eclipse Spyder GT 3.0L MIL Lamp on VIN: 4A3AE85HX1
P0431: Warmup Catalyst Efficiency Low (Bank 2). ... had both P0421 and P0431 codes. I performed a cat burnout...Removed 1 plug wire from each bank and ran engine at 3000rpm for 3 minutes. Both cat monitors completed and car went home. A pending P0431 came back. idles normally but sets a P0507 high rpm.
April 23, 2013