Q: Exhaust smoke when in idle

asked by on September 12, 2016

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

My 2010 Audi A4 stopped out of no where at a stop sign maybe a month ago. It still has not started. All lights work
Hello. When this occurs, the first thing I do is try turning the engine over by hand. If I cannot turn the engine over by hand, then I know that the engine is seized. If it is seized, then it...
ABS/Parking warning lights back on after supposed fix
To read the flash codes, make sure you have a clean and stable chassis ground or the codes will not flash. If there is a secure ground and no flash codes, then it is quite possible that this is an...
Serpentine belt constantly slips off
Hi. Most likely there is something out of alignment in your pulley system causing the belt to come off. The first thing to inspect would be the idler pulley (https://www.yourmechanic.com/services/idler-pulley-replacement). Remove the belt and check if the pulley wobbles. If...
Power steering failure 2005 Pontiac G6
Hello - this steering behavior does resemble the symptoms from that Recall (14V153000). The specific component that failed for your model was the "steering torque sensor" and should have been replaced as part of the Recall (Bulletin 14116 ). I...
Check drl system
Hello, thank you for writing in. The computer is trying to detect the bulb, but cant. Sometimes this can be a fuse issue, and it may require removing and replacing the fuse for the headlights (https://www.yourmechanic.com/services/headlight-is-not-working-inspection). Secondly, the LED bulb...
Car ran out of fuel put more in but still not starting what could it be
Hello, thank you for writing in. Several things may be happening. One would be that the fuel pump simply burned itself out trying to suck for gas. This is not uncommon in these situations. Secondly, you may have sucked up...
error codes p0440 and p0404
Hi there. The codes you provided are commonly related to the EGR or Exhaust Gas Recirculation system; specifically the EGR valve or solenoid. You may want to read this article (https://www.yourmechanic.com/article/p0404-obd-ii-trouble-code-exhaust-gas-recirculation-circuit-range-performance-by-jay-safford) on what typically triggers these codes and possible solutions....
Can this van's alternator be put in a 2004 chevy impala?
The alternators on the two vehicles are not compatible with each other. The computers on these vehicles control the alternator charge rates and you could have a computer problem and should have the system diagnosed by a qualified mechanic like...
2010 Mazda 3 has trouble starting sometimes
Hi S.E. Thanks for contacting us today. If you turn your key, and the engine cranks over every time but is hard to actually start, then the issue is not with the starter. It's more likely that fuel or ignition...

Related articles

What Does It Mean When My Car Is "Burning" Oil?
Burning oil is usually caused by leaking oil that burns up on hot engine or exhaust components. Fix leaking oil to prevent expensive car repairs.
A Buyer’s Guide to the 2012 Hyundai Veloster
The The 2012 Hyundai Veloster has a practical design while starting at a modest price point. Its unique styling has an eye catching design makes it both fun to look at and exciting to drive. Combine the unique look, price,...
A Buyer’s Guide to the 2009 Mazda Tribute Hybrid
2009 2009 marked the end of the very short life of the Mazda Tribute Hybrid. All told, the automaker produced fewer than 700 models, and it was ultimately retired well before the Tribute itself ceased production in 2011. For the...