Symptom troubleshooter
Start with what the car is actually doing.
Use observable symptoms to choose safe next steps. The guide presents possibilities—not invented diagnostic confidence.
Prompt inspection
Open guidance →Car won't start
First separate no-crank, slow-crank and crank-no-start behavior.
Prompt inspection
Open guidance →Car shakes when braking
Vibration location, speed and pedal feedback help narrow the inspection.
Stop safely
Open guidance →Engine overheating
A rising temperature warning needs immediate load reduction and a safe stop.
Service soon
Open guidance →Rough idle
An uneven idle can originate in ignition, fueling, air metering or mechanical condition.
Prompt inspection
Open guidance →Vehicle pulls to one side
Pulling can involve tires, alignment, brakes or road conditions.