What can I do if it broke. will this bring up a code? or s it very important? thanks.

 

yes it will bring up a code. It detects knock in the engine. Its not absolutely necessary but i always liked having mine. Go to a auto shop and buy a new one and replace it.

 

nothing else I van do huh?

 

as above stated - when the code comes - it's also pulling your timing, because most knocks/pings come from detonation or too advanced timing (respectively actually). your performance will be lackluster, your mileage will be dodgey... just buy a new one

 

so a new one will be required ..if not replaced it an lead to failure uin performance?

 

yes it retards your timing which in turn will make the engine lose power.

 

aw s**t , i'll have to get a new one.