1. Check the oxygen sensor. Connect an OBD2 scanner to your vehicle and check the oxygen sensor readings. The oxygen sensor should switch between rich and lean every few seconds. If it is not, it may be faulty.
2. Inspect the catalytic converter. Look under your vehicle for the catalytic converter. It is a large, metal cylinder located between the engine and the muffler. If it is damaged, you may see cracks, dents, or discoloration.
3. Listen for a rattling noise. If you hear a rattling noise coming from under your vehicle, it could be a sign of a damaged catalytic converter.
4. Check for a loss of power. If your vehicle is losing power, it could be a sign of a clogged catalytic converter.
5. Have your vehicle inspected by a mechanic. If you are unsure whether you have a bad oxygen sensor or a catalytic converter problem, have your vehicle inspected by a mechanic. A mechanic will be able to diagnose the problem and recommend the best course of action.
Here is a table summarizing the differences between bad oxygen sensor and catalytic converter problems:
| Symptom | Oxygen Sensor Problem | Catalytic Converter Problem |
|---|---|---|
| Check engine light | On | May be on |
| Oxygen sensor readings | Not switching between rich and lean | Normal |
| Catalytic converter inspection | May be damaged | May be clogged |
| Rattling noise | No | Yes |
| Loss of power | No | Yes |
