legacycentral bbs

i checked the code in my computer and these appear 22-23-24-33
i'll like to know what they mean. i make a quick check up under my hood and i see that the ground cable on the left side was broken , i fix it. but still, i'll like to know what they mean.

www.surrealmirage.com/subaru/engine.html

Clear the codes, and see which ones come back....if any.

Do codes come on as a false alarm if the service voltage becomes low/irratic such as when the battery is dying?