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P2031 Diagnostic Trouble Code Discussion for January 2010

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Trouble Ticket Help Requests for DTC P2031
Help Request Posted
2001 Mercedes-Benz SLK230 Kompressor 2.3L MIL Lamp on VIN: WDBKK49F61
P2031: . I have a SLK 230 that is outputing code P2031. I cant find much info on it. Does anyone have a proper code description for it? The only info I can find is genaric about a rear O2 sensor. Any help would be appreciated...
January 06, 2010