buddy has a 2001 alero and this is a tough one and vague so i apologize now.We dont know where to start. engine light brake light abs and tractionligh are on. I looked up all the codes and wonder if it all stems from the antilock system under hood. no mechanical noticeable issues just all lights and codes c1222 c1225 c1226 c1233 c1234 c1235 c1254 c1245 c1275 c1298 . Where the heck do we start. would one primary problem Cause multiple issues?