Exhaust on Cold Startup

[pryan]

I have a 2021 with just over 14,000 miles. Because it’s cold in the morning, I will often start it and let it run for a few minutes. I’ve noticed that it produces what seems to be an excessive amount of exhaust.
it’s white, and appears to have a sulfur sort of smell. In other words, it doesn’t seem like it is “burning” anything. But, I don’t think I’ve ever had another vehicle that seems to produce that much exhaust even on a cold morning.
I’ve seen posts about exhaust after sitting, but this is something that happens every day. Any ideas?

 

[UNBROKEN]

It’s normal…and worse in cold weather.

 

[northof60expST]

Same thing here at -25 to -35 C. I am not noticing the sulfur smell.

 

[pryan]

It’s not really strong.

 

[northof60expST]

I did a quick web check... "broken or leaking catalytic converter " could cause that type of smell.
In cold weather you can see exhaust leaks very clearly. Anyway, something to look into.

 

[UNBROKEN]

I did a quick web check... "broken or leaking catalytic converter " could cause that type of smell.
In cold weather you can see exhaust leaks very clearly. Anything something to look into.

Normal smell on a cold start…as is steam coming out of the exhaust. The colder it is the more steam and the longer the smell will last.

 

[pryan]

Thanks folks. That’s comforting.

 

[hbalek]

Mine got worse and worse since the first year and at 3 years had my catalytic converter replaced on the driver's side. Now I'm happy to report no more exhaust smell even on cold days.