# Exhaust and smoke problems

Every exhaust and smoke symptom we cover, with its most common cause and how urgent it is.

## 3 exhaust and smoke symptoms

| Symptom | Most common cause | Verdict |
| --- | --- | --- |
| [Why is black smoke coming from my exhaust?](/symptoms/black-smoke-from-exhaust) | Faulty air flow, coolant temperature or oxygen sensor | Drive to a shop this week |
| [Why does my car smell like rotten eggs?](/symptoms/car-smells-like-rotten-eggs) | Failing or overloaded catalytic converter | Drive to a shop this week |
| [Why is white smoke coming from my exhaust?](/symptoms/white-smoke-from-exhaust) | Condensation on a cold start | Drive to a shop this week |

## Other symptom groups

- [Engine](https://diagxcar.com/symptoms/engine)
- [Brakes](https://diagxcar.com/symptoms/brakes)
- [Battery, starting and electrical](https://diagxcar.com/symptoms/electrical)
- [Cooling and overheating](https://diagxcar.com/symptoms/cooling)
- [Transmission](https://diagxcar.com/symptoms/transmission)
- [Steering and suspension](https://diagxcar.com/symptoms/steering)
- [Tires and wheels](https://diagxcar.com/symptoms/tires)

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Source page: https://diagxcar.com/symptoms/exhaust
General information, not a substitute for a qualified mechanic.