check engine light?

alright well as the title says my check engine light is on. i just got my computer in and so everything should be good. well i have a code that says that my map sensor is out. so i bought and replaced the sensor with a brand new sensor and erased the code and after 5 mins of driving the code came back up. i dont know how to get this code off any ideas?

if you put in you old computer does it still give the light?

you sure its MAP and not MAF, right? (had to ask)

could be a vacuum leak causing misreading of sensor

We could give you a more informed answer if you post up the code number.