1992 Cav with 165K miles, I had a small exterior head gasket coolant leak that was fixed this morning with Bar's leak. This afternoon the check guages light came on all guages were normal. the light went out after 5 minutes and never came back on during this 45 min trip, What could cause this?

Sometimes this happens. That actually happened to mine today. I just restarted my car and it went off.