I've got a EK with a prelude engine. I bought this car as a project car, but I'm getting a little worried that it needs more than I can handle. I have four codes currently code 3, 9, 22, 41. I know one of the code is related to the car having a button you have to push before turning over the ignition, one code is a bad o2 censor, one code has to do with cylinder 1 position censor, one is related to a bad map sensor. The car is having troubles at idle, so I went ahead and replaced the map but it didn't seem to do anything... its still has a funny idle and is running very choppy. where do I go next. tps sensor? Clean throttle body?

 

If diagnosing your car is more then you can handle, then you should take it somewhere who knows hondas and have it fixed.