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When Do You Need Car Diagnostics?
When the warning light comes on
This is the most obvious sign — but not the only one. Simply switching the light off doesn't fix the underlying problem.
When the car's behavior changes
Power loss, unstable idle, increased fuel consumption, a change in automatic transmission shifting — all of these are reasons for diagnostics, even if the warning light hasn't come on yet.
When buying or selling a car
An objective, independent check benefits both sides — it reduces the risk of surprises.
As routine prevention
Some faults don't show a visible symptom right away. Periodic scanning lets you catch a problem early, before it becomes more expensive.