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Discussions tagged 4x4,jeep,check engine light,p0300,Jeep JK

JK Check Engine Light - P0300

My INNOVA 5310 code reader revealed a stored trouble code - P-0300.  By definition, that code indicates multiple random mis-fires. The list of possible causes was long, some easy and some not so easy.  A series of repairs were in order, starting with a new battery and tuneup.A new battery (Optima ...
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