Q: Heavy toxic smell coming through AC vents

asked by on October 06, 2016

Coming from engine area - intermittently I get a heavy toxic smell from the AC vents - what do I do? What is malfunctioning?

My car has 136000 miles.

Oil/Fluid Leak Inspection $94.99 - $114.99 Get a Quote

Hi, thanks for writing in. This may be potentially a smell of AC refrigerant if you have a refrigerant leak. This sometimes happen when there is a leak in the AC refrigerant system. I would recommend having an expert from Your Mechanic come to your home to diagnose and repair this leak as it is very dangerous to inhale.

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

How Do I Clean My Car Mirrors?
Cleaning your mirrors (https://www.yourmechanic.com/article/what-is-the-best-way-to-clean-car-mirrors), or any glass for that matter, can be done with good results or poor results. There are some basic things to remember when cleaning your mirrors. This works for your windows too. First of all, do...
How do I change the audio controls?
You can customize the audio controls to make the sound system ideal for your ears. The controls that you can personalize are Bass, Treble, Balance, and Fade. Adjusting these controls only takes a few seconds: 1. Press the Setup button....
ABS actuator to be replaced 2nd time in a year
Hello. There is no other permanent fix for this other than replacing it with a factory unit. Once it is replaced the connections and the grounds need to be checked. Also all of the wheel speed sensor signals need to...
I have an aftermarket intake and it's reading 4.9 psi. Is that good or bad?
Hi there. An intake manifold should read 19 to 22 hg. This is 19 vacuum to 22 vacuum. If you are getting a psi reading, then there is either a turbo on your vehicle or the engine timing is out...
I replaced the camshaft position sensor and now my car stalls after 10 seconds.
Hi there. The crankshaft position sensor works in junction with the camshaft position sensor. Check the crankshaft position sensor and see if the wiring is loose or disconnected. Check the sensor for any voltage reference coming out of it when...
car losing power and slipping
Hello, thank you for writing in. The vehicle may be suffering from a large number of issues. You are going to want to start with the most obvious and likely to fail at almost 200,000 miles. Starting with the "slipping"...
Where is the location of transmission solenoid for 2000 Honda Accord
If you are referring to a transmission shift solenoid(s) that component is within an internal transmission assembly known as the transmission "valve body". The valve body can sometimes be removed from the car for service, including replacement of the solenoids....
Can the secondary air injection relay cause my transmission to randomly not perform as it should?
The previous issues that you've had with the transmission it is possible and very likely that the transmission itself is still the cause of this issue and the shop that installed it is trying to avoid any liability. Unfortunately in...
Hey, Mia same thing happens to me. I mean the brake lights themselves
You should have the brake light switch checked to see if it is adjusted correctly or is over sensitive and needs replaced. This is for the rear lights coming on without touching the pedal.

Related articles

A Buyer's Guide to the 2012 Honda Crosstour
There There could be a number of reasons an SUV isn’t right for you: the price, the size, their mpg, etc. However, there could also be a number of reasons you’d really like to have some extra space. If that’s...
2012 Honda Pilot vs. 2012 Acura RDX: Which One Should I Buy?
Sport utility vehicles are fun in the sun, sand, dirt, mud, and even in the carpool line at school. Whether you’re hauling around your family or your family of pets, these SUVs are sure to make even a drive around...
The Best Used Cars to Buy If You Have Kids
Once Once you have kids, the kind of car you have becomes very important. Suddenly, the amount of space, entertainment features, reliability, safety, and easy to clean interior become the top priorities. Here’s a list of vehicles meant to satisfy...