What can cause this
My car has 2379323 miles.
My car has an automatic transmission.
White smoke generally indicates that you may have an internal engine problem, such as a head gasket leaking coolant into a cylinder. Lots of white exhaust smoke on start up is usually a sign of a head gasket problem. If the leak is very small, or leaking into adjacent cylinders, there may not be much smoke upon starting up, and yet still enough coolant may be pulled into the combustion chamber(s) to produce a strong sweetish exhaust smell. Generally, over the long run, this particular problem will continue to produce more engine problems. I would recommend having an expert from YourMechanic come to your location to inspect your car’s running condition to determine what may be causing the smoke coming from your exhaust.
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