#repair
13 posts in Car Diagnostics blog about "repair" — OBD-II diagnostics, DTC codes, repair. ← All posts
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The car will not move in Drive: gearbox, fluid, or limp mode
Selector in D, engine running, car stationary. The causes from fluid level to limp mode, and what to check first.
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Reverse will not engage: manual gearboxes and what goes wrong
On most manuals reverse has no synchroniser — which is exactly why it crunches. The causes and what to fix.
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Heated seats: why they stop working and what to do
The heating element breaks from flexing rather than from age. The causes, the repair, and why not to ignore it.
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The clutch pedal went to the floor: hydraulics, not the clutch
A pedal that suddenly drops almost always means hydraulics rather than the disc. The cylinders, the fluid, and what to do on the road.
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Puncture repair: plug, patch, or mushroom — which is most reliable
Not every puncture is repairable, and not every repair is equally reliable. The methods, the repairable zone, and what cannot be fixed.
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A workshop quote: how to read it and where to ask questions
An unclear invoice is not always dishonesty, often just a badly written document. The structure and the questions to ask before work starts.
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Choosing a workshop: the signs you will be treated fairly
A good workshop is recognised not by its repairs but by how it talks about diagnosis. The signs and the questions worth asking.
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Vibration under braking: why discs do not actually warp
Discs almost never distort from heat. The real cause of judder, the role of uneven pad deposits, and why skimming does not always help.
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Electric window not working: motor, mechanism, or module
A window that moves slowly or stops warns long before it fails. How to separate the motor, the cable mechanism, and the electronics.
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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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Clutch nearing the end: the signs, the checks, and the driving habits that cause it
A clutch rarely dies suddenly. The early signs, two checks that need no ramp, the difference between manual and dual-clutch units, and what diagnostics sees.
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Vibration at idle and a thump when pulling away: worn engine mounts
An engine mount is a cheap part whose wear gets blamed on the engine and gearbox. The symptoms, two checks without a ramp, and why hydraulic mounts fail quietly.
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Post-repair verification: 7 OBD steps to confirm the fix actually worked
What to do after replacing an O2 sensor, catalyst, MAF or injector: run a drive cycle, read Freeze Frame, Mode 06, compare LTFT before/after — to be sure the repair is solid.