Exhaust Noise at Idle - Toyota RAV4 2020
An unusual noise from the exhaust system at idle on a 2020 Toyota RAV4 may indicate an exhaust leak, loose heat shield, or a failing exhaust component. The noise is often described as a hissing, ticking, or rattling sound.
Diagnosis Details
Possible Causes
Exhaust manifold gasket leak or cracked manifold
Loose or damaged heat shield
Exhaust pipe or muffler corrosion/hole
Related OBD-II Codes
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What You Should Do
Inspect the exhaust system for visible leaks, loose shields, or damage.
Listen for the noise source while the engine is idling.
Tighten any loose heat shields, and replace gaskets or damaged components as needed.
A professional exhaust system inspection is recommended if the cause is not obvious.
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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.