Check engine light flashes and vsa light on. Multiple trouble codes.Where should I start?

Question

engine light came on and flashes and vsa light on as well. a friend pulled these trouble codes p0339 ckp sensor circuit intermittent interruption, p0303 misfire cyl3, p0302 misfire cyl2, p0300 random misfire. the person that pulled these codes wrote down HA052 but I cannot find anything on it. Please what should I check first . What could cause all these codes at same time? My battery is about a year old car passed smog after changing the battery. The starter was replaced a month ago however it still made a horrible sound when I start it sometimes but not all the time. I have barely driven it since replacing the starter. Any kind of picture showing where ckp sensor and anything else I should check would be really appreciated! 2008 Honda accord 4cyl 2.4l sedan.

Answer 1

You may have multiple problems. The crankshaft position sensor is behind the plate next to the oil filter. For the misfire code you may have to adjust the valves. The valve adjustment is part of the maintenance.