#noise
7 posts in Car Diagnostics blog about "noise" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Rattling over bumps: how to find the loose part
Rattles are frustrating because they only happen while you are driving. A systematic bounce test in the driveway finds most of them in twenty minutes.
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Whining noise when accelerating: belt, pump or gearbox?
Whether the pitch follows engine speed or road speed is the entire diagnosis. One test in a car park separates a cheap belt from an expensive differential.
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Wind noise in the cabin: seals, mirrors, and what to do about it
Noise that appears at speed usually has a mechanical cause you can find in minutes. The sources and how to trace them.
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Power steering: whining, leaking, or gone heavy
A whine on lock usually means air or fluid level. Hydraulic system symptoms and how an electric system differs.
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Clicking when turning: driveshaft joint, top mount, or brakes
A distinctive click on lock almost always means one thing. How to separate a CV joint from a top mount, and why a split boot decides everything.
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Rattling underneath: heat shield, mounting, or silencer
A metallic rattle at particular revs usually costs almost nothing to fix. How to tell a heat shield from a blown silencer, and why not to run it on.
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A hum at speed: bearing, tyres, or driveshaft — how to tell them apart
A hum that rises with speed comes from three different components. How to separate them on the road without a ramp, and why ABS sometimes finds it before your ear does.