ecu throwing code 12

i have a 87 prelude that is throwing a code 12 need to knwo what it is and how to fix it

i have a 87 prelude that is throwing a code 12 need to knwo what it is and how to fix it

I believe you are in the 3th gen range Right? Well if you are then here is website that has code 12.
HERE (http://hondaprelude.to/articles/maintenance/check_engine.html)

Hope this helps laters