Where you feel the vibration and at what speed it appears identifies the cause before anything comes off the car. Steering wheel, seat and pedal each point somewhere different.
Whether it refuses every gear or only one narrows the cause immediately. A clutch that will not release and a stretched selector cable feel similar and cost very differently.
BYD sells mostly electric and plug-in hybrid vehicles, which changes what OBD-II can tell you. Changan combustion models read conventionally. The difference is worth understanding first.
Two PSA staples running the same engines as half of France. The wet timing belt on petrol models and the additive-dosed diesel system are the two things to understand.
Some clunk is normal — drivetrain slack has to be taken up somewhere. Telling normal slack from a worn mount or a failing gearbox comes down to timing and repeatability.
Dacia runs proven Renault mechanicals with the complexity removed. That makes faults predictable and parts cheap — and it makes the few known weak points worth knowing about.
The fault happens on the way to work and never at the workshop. Logging turns that into a solvable problem, because the recording is the diagnosis.
Dodge and Ram share modules and wiring conventions with the wider Chrysler group, including one architectural quirk that explains a whole class of confusing electrical faults.
Newer vehicles move diagnostics onto automotive Ethernet for speed. The generic OBD-II data you rely on still works — what changes is everything beyond it.
The filter needs about twenty minutes of sustained motorway speed to burn off soot. Most people give it ten minutes of town driving and wonder why the light stays.
A healthy-sounding crank with no start narrows the problem to three systems. Knowing which one to test first, and what OBD can tell you before you open anything, saves the whole afternoon.
The Ducato serves two very different lives — daily delivery van and motorhome that sits for months. Each produces its own fault set, and the standing one surprises people.