Smoking from exhaust pipe

Depends on where the smoke was coming from. I would bet it's oil smoke but it could be coming from a blown head gasket or it could be from an oil leak hitting your exhaust pipes. You likely seized the engine after it ran out of oil.

first step is to check and see if there is any oil left. If nothing shows on the dipstick, does the engine still turn over? If it does, pull you speak plugs one at a time and check them for oil or possibly coolant. If you have fouled plug(s) you blew a head gasket.

when you check the oil see if it looks like a chocolate shake. That indicates a blown gasket because coolant is mixed in.

either way you are likely looking at a big repair bill. You should have pulled over when it started smoking and definitely should have stopped when the lights came on.

Is the smoke constant while the engine is running? Take the heat shields off and check for cracks, leaks, or loose exhaust bolts.

Regarding 2001 audi a6 quattro 2.7t....i was driving to work the car was fine then white smoke starting coming from under the hood and tail pipe. i stopped veilce and alot of oil was dripping from front of car. I towed it home and i looked under the hood and there was oil from valve cover gasket. i let the car sit for a few days, had it running again for a good hour and no white smoke was coming out. I removed the valve cover and gaskets are all bad. i want to know can the valve cover gasket leak cause the white smoke to come from exhaust pipe?

White smoke is usually a sign for a bad head gasket. How much white smoke is coming out? Also, are you losing coolant and can't find a drip under the engine?

If any electric welding was used on the car during the exhaust pipe work and the ground clamp wasn't in the proper location, there is a possability that your gearbox might have been damaged (fried).

Generally, white smoke is engine coolant burning. If it only happened for a few seconds, you may have leaked some on the exhaust pipes.
I would check the engine oil and coolant levels with the engine cold, and then look for coolant leaks.

check engine light on

The dinging from the dash is the Air bag system check. Check that the bulb in the dash isn't burned out. The stalling and spitting could be clogged converter. Check how much exhaust is coming out of the tail pipe when you rev it. The smoke could just be from a leaking valve cover gasket.

It's probably OK to drive. I imagine they failed to get the oil filter properly seated and you're getting a little leak there. DO BE SURE to check the oil level before you drive it and add if necessary.

white smoke out off exhaust is coolant getting into cyl like a bad head gasket to much fuel would be black smoke