| DEFINITION: An audible or physical noise due to a faulty component or damaged components causing a loose or misaligned exhaust system resulting in a rattle or vibration noise, i.e. buzz, groan, hum. Refer to Symptoms - Engine Exhaust prior to beginning this table. |
| Popping or hissing noise |
Exhaust leak. Refer to Exhaust Leakage . |
| Loud exhaust |
- Compare to a known good vehicle.
- Inspect for a damaged or failed muffler.
- Replace the faulty muffler. Refer to Exhaust System Replacement (except 2.0L Diesel LUZ) and Exhaust System Replacement (2.0L Diesel LUZ) .
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| External rattle or vibration noise |
- Inspect for a bent or loose hanger, loose heat shield or loose clamp.
- Inspect for an exhaust pipe causing interference.
- Repair or replace the affected component. Refer to the affected component's service procedure.
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| Internal rattle |
- Test the components by tapping with a rubber mallet to confirm a rattle.
- Replace the faulty catalytic converter or muffler. Refer to one of the following procedures:
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