Camaro rough running exhaust smell

Sounds familiar. I had a similar issue with my old Audi A4, although it was a diesel. Check engine light, rough running... turned out to be a faulty oxygen sensor. That can mess with the whole exhaust treatment system. Have you considered that? It could also be related to the particulate filter or maybe even the EGR valve.

Thanks for the quick reply! Oxygen sensor, huh? Where exactly is that located, and is it something I could potentially check myself, or is it best left to a professional? And if it was the sensor, did you also notice an exhaust leak?

On the Audi, the O2 sensor was near the catalytic converter, but location varies. Unless you're comfortable with car diagnostics, I'd recommend getting it checked professionally. I didn't have a noticeable exhaust leak, so that symptom might point to something else in your case. Get the codes read. Could be a lambda sensor defect. I ended up having a similar exhaust treatment malfunction. Better safe than sorry.

Okay, I appreciate the advice! I'll take it to a mechanic and have them check the oxygen sensor and the rest of the exhaust system. Hopefully, it's just a sensor and not something more serious. The repair cost was 375€ in the end, it was indeed the lambda sensor. Thanks!