p28 turns into ak47!!!!

im doin 40 and all of a sudden my ecu starts firin codes and my cars starts doin the 2 step. can some one drop me some info on how you set up the ecu to check the codes. the check engine light sends chills down my spine i hate it.tried searching it but got nowhere.

got the answer on this honda site thanks anyways. when your check engine light is on does your ecu automatically switch to safe mode?
now there black smoke comin out im guessin it a bad air fuel mix.



the codes i got were

map sensor
intake air temp
v-tec pressure valve

i know what the air temp sensor and the map sensor does but what does the v-tec pressure valve do?????

is there a common problem with b18s that these codes reflect?