Exhaust System Leak or Heat Shield Rattle
A constant unusual noise from under the car on a 2020 Ford Explorer could indicate an exhaust leak, a loose heat shield, or a failing exhaust component. The noise is present all the time, suggesting it is not intermittent and likely related to the exhaust or drivetrain.
Diagnosis Details
Possible Causes
Exhaust leak at manifold gasket, pipe joint, or catalytic converter
Loose or corroded heat shield vibrating against the underbody
Failing catalytic converter internal structure causing rattling
Related OBD-II Codes
Not satisfied with this diagnosis?
Try Another DiagnosisWhat To Do Next
What You Should Do
Inspect the underside of the vehicle for visible exhaust damage, loose heat shields, or rattling components.
Listen for the noise with the engine running and revving.
If safe, check for exhaust leaks using a soapy water spray.
Have a professional mechanic perform a full exhaust system inspection and check for any drivetrain issues.
Related Repairs
Share this diagnosis
Help others with similar symptoms
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.
