Engine light came on. Only two codes showing. P1684 - Replaced battery a day or two before the engine light coming on. Wifes car, who told me of the light.
From what I have found the P0442 is an EVAP leak. Possibly the gas cap. Checked & it is tight. Will this code set the engine light? Car has 166,XXX miles. Anyone know the most comon issue that causes the P0042 code or is the engine light unrelated? I think maybe I knocked something loose on the EVAP system changing out the battery, but that is just a WAG. Several hoses down around the bottom of the air box which I unbolted at the frame to gain a little wiggle room for my hands. Any clues on a best place to start looking are greatly appreciated?

The car seems to be running fine.