Exhaust System Leak or Loose Component
A continuous unusual noise from under the vehicle, such as a rattle, hiss, or rumble, often indicates an exhaust leak, loose heat shield, or damaged muffler. This can affect performance and fuel economy.
Diagnosis Details
Possible Causes
Exhaust manifold gasket leak or cracked exhaust pipe
Loose or broken heat shield
Failed catalytic converter or muffler internal damage
Related OBD-II Codes
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What You Should Do
Inspect the underside for visible damage, rust, or loose parts.
Listen for the noise source with the engine running.
Tighten any loose shields or bolts.
If a leak is suspected, have a mechanic perform a smoke test or pressure check on the exhaust system.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
