[82Stang]

Hello, the p0128 is a coolant related code, not up to tmp. Likely the T-stat, should have oem 195 T-stat. If a colder T-stat was used previously, that would set the CEL. If not T-stat, then coolant temp sensor and last possibly a coolant mixture that is set too cold for the colder climates, i.e. coolant set to -50 below F, -20 is fine. The p0442 is a small evap leak and that can mean many different things. First and easiest, is a new gas cap. Also check all vac hoses under hood, check fuel filler neck for cracks, rust through, broken vent tube etc. When in doubt and if inspection isn't needed anytime soon, clear the codes and see what comes back. You can clear the codes with a scan tool or unhook bat cables, pos and neg, and touch them together for a minute, or just unhook neg cable for 5 mins or remove the bat fuse.