Back to all

No Yolk! Rotten Egg Smell (Sulfur Smell Causes)

March 26, 2023

The pungent smell of rotten eggs can send people running for the hills.  So when that odor is inside your vehicle, yikes!  Yolks!  The good news is that a trained service technician can search the source of that smell and stanch the stench… that comes from another words that begins with S.  Sulfur.

Fuel contains small amounts of hydrogen sulfide, but they're enough to stink up a vehicle when it's not properly burned.  You may know that the smell of rotten eggs can often be a sign of a catalytic converter that isn't working the way it should.  That could be due to age, damage or an abundance of oil that's clogging it up. 

If a sensor in charge of managing the fuel has failed, the engine can run with too rich of a fuel mixture.  That can overload the catalytic converter and allow some of the byproducts to escape without interruption from the chemical reaction that is supposed to prevent them from going out the tailpipe.

There's another possibility, but it's usually only in stick shift vehicles.  That's leaking, old transmission fluid.

Catalytic converter repairs are best left to a professional. Technicians at your vehicle service facility have equipment and training that can help them pinpoint the cause of this funky fragrance.  Once the cause is found, repairs made and/or parts replaced, the smell should go away fairly rapidly.

Tuffy Bonita Springs
27790 S. Tamiami Trail
Bonita Springs, Florida 34134
239-498-9940
https://www.tuffybonitasprings.com

Need Service?

Request a Quote

More articles from Tuffy Bonita Springs

Why is My Brake Pedal Hard to Push?

November 2, 2025

When you push on your brake pedal, you should find your vehicle easy to stop. But at some point, you might notice stopping takes much more pressure on the pedal than it used to. When it gets to that point it becomes a safety issue, and you should bring your vehicle in so we can track down whats... More

What Is an EGR Valve? (EGR Valve Service)

October 27, 2025

If you've ever felt your vehicle hesitate, go, then hesitate again, you might think there's something wrong with the transmission. After all, it's not moving smoothly down the road. But there are plenty of malfunctions that can cause those symptoms, one of them being something you may have nev... More

Time for a Brake (Brake Pad Replacement)

October 23, 2025

Stop! It's one of those things your vehicle has to do consistently and reliably. That's why brake maintenance is vitally important, worthwhile for you to make sure stays up to date. A brake system has many components. If your vehicle has disc brakes, they have pads that make contact with the rot... More