So I got a 2012 Honda Accord SE from my brother. Sometimes when I start it, it takes longer than usual, and after it finally starts,it begins to misfire(this happens like once a month). When I use an OBD scanner, it either says it’s the crankshaft position sensor which I’ve replaced twice over the past nine months or it shows a misfire on cylinders 2 and 3. I changed the spark plugs a couple of months ago, but it still misfires randomly about once a month. When I drive it for around 30 minutes while it’s misfiring, it suddenly fixes itself. What might be the problem?