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I have tried to search this form, but have not seen this code. There was a slight hesitation when I pulled out of my drive and check engine light came on. P0300 is the code I retrieve.
 

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Have you changed anything with the motor? To clear the code disconnect the negative battery cable for a bit, say a couple of minutes, then reattach. That should clear the code. If it comes back within a few days you may have an issue.

My XK did this a while ago. I did the above procedure and it has yet to return.
 

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I have not changed anything, but I did have the AC worked on last week. They added freon and checked for leaks. Who knows what they bumped. I have had the hesitation before, but the ck engine light did not come on. I will reset and see what happens.
 

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I have tried to search this form, but have not seen this code. There was a slight hesitation when I pulled out of my drive and check engine light came on. P0300 is the code I retrieve.
Go here for all trouble codes: http://www.wjjeeps.com/faultcodes.htm#2000

P0300 is multiple cylinder miss detected. Turn the CEL off and see if it comes back on.
 
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