# Toyota Camry Hybrid 2007 - Sulphur Smell from exhaust **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** catalytic-converters, camry-hybrid, toyota\ **Created:** [January 10, 2025, 12:48am UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650 "2025-01-10T00:48:58Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![v.bawks\_192444](https://avatars.discourse-cdn.com/v4/letter/v/ea666f/32.png) [@v.bawks\_192444](https://community.cartalk.com/u/v.bawks_192444)\ **Post date:** [January 10, 2025, 12:48am UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/1 "2025-01-10T00:48:58Z")
Recently noticed a distinct sulphur smell coming from my exhaust pipe when my Hybrid Toyota Camry 2007 is idling/driving. I’m not getting any check engine light, not a noticeable decline in acceleration and fuel economy could be slightly worse but not enough to be sure. Did a quick scan after a short drive on a personal scanner and it was coming back that my second down stream oxygen sensor was dead in the water. Put some premium gas in my car just to see if that made a difference. Went to a mechanic shortly after to get a proper scan and see about a new cat and sensor. That scan came back that everything was fine and both sensors were working and not showing any problems. The mechanic too a look underneath and advised everything looked fine. He was convinced my issue is not the cat but I’m not. Are there any other sensors that monitor the cat performance that would go off if there was issue and my oxygen sensor is dead? Any other causes of this smell?? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 10, 2025, 12:53am UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/2 "2025-01-10T00:53:23Z")
> **[Why does my car's exhaust smell like rotten eggs? | Trust My Mechanic](https://www.trustmymechanic.com/why-does-my-cars-exhaust-smell-like-rotten-eggs/)** > > If your car's exhaust smells like rotten eggs, it is likely due to the presence of hydrogen sulfide (H2S) gas. There are several reasons why you may be... Tester ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [January 10, 2025, 4:12am UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/3 "2025-01-10T04:12:09Z")
> [@v.bawks\_192444](#): > > my second down stream oxygen sensor was dead in the water. The downstream sensor is supposed to look like it’s dead in the water. (See [here](https://www.youtube.com/watch?v=KGpMzdEO5KY&ab_channel=JustinMiller)). That said, the #1 reason for the sulfur smell is a bad cat. But see Tester’s link. > [@v.bawks\_192444](#): > > Put some premium gas in The gasoline octane is irrelevant. “Premium” is mislabeled. It’s not somehow “cleaner” or “better.” It just higher octane and resists combustion more than lower octanes and is largely relevant only with high-compression engines. Your Camry just needs 87 octane. > [@v.bawks\_192444](#): > > Are there any other sensors that monitor the cat performance that would go off if there was issue and my oxygen sensor is dead? There are no other sensors that monitor cat performance. There are codes that can indicate problems with the downstream sensor. But none of that is relevant to the sulfur smell. If you can post some graphs of your O2 sensors live data (up and down stream, that might show something). ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [January 10, 2025, 4:49am UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/4 "2025-01-10T04:49:03Z")
> [@v.bawks\_192444](#): > > He was convinced my issue is not the cat but I’m not. You are willing to spend $1,000 for better smelling exhaust? Probably won’t help. Increased exhaust odor in cooler weather is a common occurrence. The winter fuel in my area causes a foul smell from the exhaust, more noticeable in older vehicles. This is a message from Toyota: ![image](https://global.discourse-cdn.com/cartalk/original/3X/3/a/3a1041c71b4fa1f429a2421d397902a7cef9b762.png) ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [January 10, 2025, 1:31pm UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/5 "2025-01-10T13:31:23Z")
Nevada beat me to it. There can be a variation in the sulfur content from one brand of gas to another, so switching brands might yield an improvement for the OP. That being said, some cars (the early Ford Taurus models come to mind) seemed to emit more of a sulfur smell from the exhaust–even when brand-new–than other models. However, I don’t think that this problem applies to more recently-made vehicles. I strongly recommend that the OP begin a bit of experimenting with different brands of gasoline. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [January 10, 2025, 3:22pm UTC](https://community.cartalk.com/t/toyota-camry-hybrid-2007-sulphur-smell-from-exhaust/198650/6 "2025-01-10T15:22:09Z")
Yep, unless the check engine light is on I’d assume this is due to sulfur in the gas and/or cold weather.