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DIY Diagnostics

Pick what your car is doing. You'll see the usual causes, from most to least common, plus quick safe checks and when to call a pro.

General info, not professional advice. These are common causes that apply to most cars, not a diagnosis of yours. If you are unsure or a problem affects brakes, steering, airbags or fuel, see a qualified mechanic.

StartingCar won't start or cranks but won't startElectricalBattery light on or charging problemsCoolingEngine overheatingBrakesBrake noise or a pulsing pedalBeltsSquealing or chirping from the engineSuspensionClunking over bumpsEngineCheck engine light basicsClimateA/C blowing warm airElectricalHeadlights or electrical problemsLeaksLeaks: identify by fluid color