Skip the auto shop - Our mechanics make house calls

Q: Exhaust smoke when in idle

asked by on

I was sitting at drive threw and noticed white smoke coming from only one of the exhaust pipes. Problem stopped and has not returned. What could this possibly be?

My car has 117000 miles.
My car has an automatic transmission.

A: Hello. This may be nothing at all. Most of ...

Hello. This may be nothing at all. Most of the time this is caused by a little condensation in the exhaust system which ends up burning off in the form of smoke. It can also be caused by a internal engine issue caused by a leaking valve stem seal, but that does not sound like the case. If the problem has not come back then it should not be anything to worry about. I would just keep and eye on the fluid levels to make sure that it is not burning any of the fluids. If the problem persists, consider YourMechanic, as one of our mobile technicians can come to your home and diagnose the smoke firsthand for an accurate repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Water coming out of the exhaust pipe

Hello. Water coming out of the exhaust pipe is usually an indication of a blown head gasket. The head gasket is located between the engine block and the cylinder head. Antifreeze runs over the head gasket and when working properly....

Q: Mechanic says front sway bar needs replacing...assume should be done.

Hello, thanks for writing in about your 2009 Nissan Murano. I believe your mechanic is correct. You may ask him why it needs to be replaced so he/she can instruct you on what exactly is wrong with it. If you'd...

Q: Engine stopped running while driving and will not start again.

Hey there. As you know, this P0340 code indicates the camshaft position sensor is either faulty or not connected properly. The camshaft position sensor monitors the speed of the camshaft providing the ECU with this information. The ECU uses this...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...