white smoke on 2005 Scion xA

after my car has been sitting a while- overnight- when I first start it there is a small puff of white smoke from the exhaust- not always but about every 2-3 days or so. hubby just checked/ filled the oil last week. Could he have put too much oil in?

Asked by for the 2005 Scion xA
no, white smoke is burning coolant. it could be a head gasket but have a shop check it for you to confirm. it could be a result of overheating.

1 more answer
It could also be the normal sweatting of the exhaust pipe as it warms up and then that becomes steam. Watch to see if it goes away after five or ten minutes worth of driving.