Get it checked soon
Engine Knocking Sound: Fuel Issue or Something Serious?
Not all engine knocking is equal — where it happens tells you how urgent it is.
The symptom
A metallic knocking or tapping sound, often worse under acceleration.
What's causing it
Light knocking under load can be low-octane fuel or carbon buildup. A deep knock audible at idle is a different story — it often signals worn bearings.
What to do
Try better-quality fuel first if it's only under acceleration. If you hear a deep knock even at idle, stop driving and see a specialist immediately — this can mean real engine damage if ignored.
Confirm which type you have with a GetAutoSure scan.