That's a lot of questions. First, the codes you list are manufacturer specific codes, and I don't have access to Honda's listings here at home. A miss can be caused by any factor that allows for incomplete or no combustion...worn plugs, restricted injectors, mechanical problems, etc. 150,000 miles is not bad on a Honda...they last a long time! Fuel injectors vary in price, but on average they are not cheap. There are companies, however, that can clean the ones you have if that is all that is wrong with them. Their removal does have a few important steps you need to be aware of, and is not overly difficult if you have some experience and the proper hand tools. Just be sure you review and understand the steps involved before you start.Service information can be found in a variety of sources...most auto parts stores carry paperback manuals you can purchase. Mitchell 1 is a company that provides online service information subscriptions on a per vehicle basis, and as low as 9.99 for a week's access. (I would download all I could). Honda factory information is also available for a fee, as are all other manufacturers. There is a table of the various websites at www.nastf.org. I have a link to MItchell at www.autoservicetech.com.Before you spend any money on parts, get some help on diagnosing exactly what's wrong with your car. It may turn out to be something simple, and cheap....