hi got my ecu read cause the managment light was on it was my map sensor
there was also codes with letters and numbers is this just a variation of the map sensor

Depends what the errors/letters are?

no i was just wondering cause the mechanic sayed there where no codes in the book with letters and numbers

he told me them but i lost the bit of paper i wrote it on

not sure what you mean but the 'Letter' denotes type of fault...'number' specifically points towards a component/anomoly.