Q: Oil and gas smell when AC is on.

asked by on

The car smells like burnt oil or gasoline whenever the AC is on with the fresh air function. The car also consumes gas faster than normal. A quarter of a full tank depleted after 15 minutes of driving. In addition, oil seems to be leaking at the bottom.

This could be a serious issue and needs to be looked at immediately. It is possible a fuel leak has developed in the fuel supply or return line. This leaking fuel could be ignited and fire could result. The entire fuel system needs to be thoroughly inspected as it sounds like fuel is being directly leaked out. I would recommend that you enlist the help of a mechanic, such as one from YourMechanic, to look at the vehicle before operating it any more.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Oil and gas smell when AC is on.

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: Engine shudder while driving, burnt rubber smell

Hello. Most of the time, this is the first indication that the timing belt is failing. The timing belt needs to be checked to see if it is going bad. If the belt is fine, then you may have a...

Q: If I take my foot up off the as it might shoot forward

Hello! Thank you for writing in with this question and concern. A surge like this could be caused by any number of electrical sensors (intake temperature sensor, throttle position sensor, etc.). It could also be caused by a mechanical malfunction...

Q: Front crank seal leaking

The crank seal is a straightforward repair. The seal is pressed into the timing chain cover, and its sealing lip rides on the harmonic balancer. If there is a groove, or the surface is pitted, the balancer will need to...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.