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  1. oconnef

    Error code 301 diagnosis

    Problem space: 2006 Jeep Wrangler Rubicon with 275k miles on the motor. Error Code 301 has been persisting for months. Formerly, I also had a 0344/0016. I replaced the OPDA and fixed some of the issue… now just have the 301. I have switched plugs, replaced them altogether, checked fuel...