I just got one of these 0300 error code (random misfire?)again. The 1st one was when I purchased it and the dealer fixed it. 15000 miles later it's back. I was able to "erase" it with my code reader, but it comes back soon after. I have heard disconnecting the battery for 45 mins will clear it too. I could always try and fix the problem, but where do I start, O2 sensor?

Thanks, Chet

 

is this the second to last generation? better yet what kind of motor do you have? and what the mileage.?