Question about 2004 Jeep Wrangler

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2004 jeep wrangler engine code P0301 - 2004 Jeep Wrangler

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  • yadayada
    yadayada Aug 23, 2010

    u have an engine misfire on #1 cylinder, have it diagnosed.

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P0301 - Cylinder 1 misfire detected........P0302 - Cylinder 2 misfire deteced, and so on........so either it is a current misfire, which you would be running on 4 cylinders instead of 3, or it is an intermittent problem.......i will provide some possiblities,,,
- ignition system (spark plugs, leads, coil packs)
- fuel system (injectors, ecu etc)
- running out of fuel
- low compression

Basically, if your vehciel has not had service for a while, change the spark plugs, and engine oil, and give her some loving, tender care....

However, if it is regularly servicedm there might be a bigger problem.....

More info required to help you.

PLease vote if you liked this response

Posted on Aug 23, 2010

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Posted on Jan 02, 2017

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jmeyer847
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SOURCE: code scan: P0301 Cylinder 1 misfire detected

Code P0301 is a generic OBD Code for Misfire. It also indicates you have a misfire in the #1 Cylinder. I would start by checking the plug wire to make sure its clean and on all the way (at the coil as well). Then if that doesnt help I would pull the plug out and check the condition of the spark plug. hopefully this will give you some direction. Thanks for Using FixYa!

Sincerely,

JC

Posted on Dec 03, 2008

  • 2926 Answers

SOURCE: 2004 jeep grand cherokee overland

P0301 is #1 cylinder misfire detected and is most likely related to a worn spark plug that is need of replacement. All plugs should be replaced if replacing one. Not sure how many miles you have on this vehicle, or if plugs were ever installed, but this is the basic step to take in diagnosis.

Posted on Jun 02, 2010

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