Smoke From Beneath Car

[kinhell]

I noticed a load of smoke coming from beneath my car (C8 Sx 2.2 HDi 2005) yesterday with a burning smell. I drove a mile today and when I got back I could see smoke coming from an open metal pipe below the car about halfway along next to the exhaust. Any ideas what could cause this and what that pipe is for?

[paul.h]

Sorry I can not help but try copying the post to the C5 pages since this engine is used on the C5 and the C5 subforum has many followers who may be able to help.

[stephenhoughton]

Hello

did you find out what this was.

just in case you did not i will tell you.

It's a heater in the exhaust system. When the car does a short run in cool temps you will see exhaust gas come from under the car just below the rear doors. When i first saw it i thought it was a problem. It's not it's normal. If the car is warmed up you will not see anything but on short runs in cool temps you will.