원문 게시자: oldturkey03 ,
[https://www.ifixit.com/User/2544783/Recardo+Grady|'''++Recardo Grady++'''] Code 0304 is a continuous misfire code for cylinder #4. #4 is the rear cyl. on the pass. side. Causes can be a bad coil or a loss of fuel in that cyl. Depending on what size engine your vehicle has, one has the coil-on-plug system while the other does not. On a 5.4L which has the coil-on-plug #4 coil is prone to failure due to water in the plug well from the heater hose that runs above it. Of course it could also be a clogged injector etc. Start with the coil…..The cost for the repair will depend on what you find during your trouble shooting.