Unusual Engine Noise Under Acceleration
A 2020 Subaru Outback produces an unusual noise from the engine compartment during acceleration. This could indicate issues with the exhaust system, engine components, or drivetrain.
Diagnosis Details
Possible Causes
Exhaust leak (e.g., cracked manifold or gasket failure) causing a ticking or hissing sound that increases with engine load.
Low engine oil or oil pressure issue leading to valvetrain noise (e.g., ticking lifters) under acceleration.
Worn serpentine belt or failing tensioner producing a squealing or chirping noise when accelerating.
Failing CV joint (especially if noise is rhythmic and from front) – though typically from wheel area, can be transmitted.
Related OBD-II Codes
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What You Should Do
Check engine oil level and condition.
Inspect exhaust system for leaks (listen for ticking, look for soot).
Examine serpentine belt for wear/tension.
If noise persists, have a mechanic perform a stethoscope check on the engine and drivetrain.
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.
