Skip the auto shop - Our mechanics make house calls

Q: Exhaust fumes in car

asked by on

Lately I have really been able to smell exhaust fumes inside my car, especially noticeable when stopped at a light, etc.

Hello. When you run the climate control, the vehicle takes air from around the engine and outside of the vehicle and uses it to warm or cool and cab. If there is any form of exhaust leak in the system, the fumes will travel into the vehicle when the climate control is run. Sometimes these fumes can enter the cabin through the windows or through a bad seal. Either way these fumes are highly toxic and prolonged exposure can cause issues. You will want to find the source of the exhaust leak and have it repaired. Typically these types of repairs are done by professionals due to the extensive labor it may include. Finding the leak can be done several ways. Sometimes it is a failed connection, while other times it can be a crack or hole. Even catalytic converter failure would cause these smells to increase. A failed cat would likely cause a check engine light and an oxygen sensor failure code. You will want to find the leak and have it repaired as soon as possible. It will make the engine run better and likely help with gas mileage as well.

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: Seeping rear right axle seal

Hello, thank you for writing in. Apologies for the difficulty in obtaining a quote. Smart Cars are a little harder to price out, and our website may not have been automatically able to do so. The average price range for...

Q: Car got hot and lost all spark,it turns over but thats it.

There may be a couple of possibilities at play here. The overheating issue may be related to a faulty thermostat, coolant temp sensor relay or potentially a blown head gasket. This can cause the car to run rough or not...

Q: Water leak, don't know where

If your engine has no external coolant leaks, and is still requiring you to put water in the radiator, that water is leaking internally inside the engine. But before jumping to that conclusion, a cooling system pressure test should be...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...