Warning lights, noises, leaks, brakes, batteries and the clues that help narrow down vehicle problems.
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Safety-critical vehicle advice should be treated as general discussion; use qualified repair help when a fault could make a vehicle unsafe.
General vehicle troubleshooting built around make, model, year, symptoms, codes and recent work. Do not treat forum advice as a substitute for qualified repair when a vehicle may be unsafe.
Community rules
Give the vehicle details. Year, make, model, engine, codes and recent work should come before a diagnosis.
Say when it should not be driven. Brake, steering, fuel and overheating issues can be safety critical.
Diagnosis is not certainty. List likely checks and evidence instead of pretending a symptom has only one cause.
After heavy rain the car vents smell musty for the first couple of minutes. The smell fades once the air conditioner runs. I replaced the cabin filter recently, and the footwells feel dry, but I haven't checked the evapo...
My car has visited the same workshop several times for different minor issues. Each repair sounds reasonable, but the bills keep arriving and I'm beginning to wonder whether underlying problems are being missed. I don't...
I get a rapid clicking sound during tight turns at low speed, most clearly when pulling out of a parking space with the steering nearly at full lock. It doesn't happen on normal corners and naturally went silent when a m...
The air conditioning is properly cold on the highway. Sit at two long traffic lights and the vents start blowing barely cool air, then recover when I get moving again. Engine temperature appears normal. That makes me won...
Occasionally I turn the key and nothing happens, although the dashboard lights stay bright. After a second attempt the engine starts normally. There's no slow cranking; it's an intermittent no-crank situation. I haven't...
The driver's window moves normally in warm weather but crawls upward on cold mornings, sometimes needing a second press near the top. I hear the motor, and the glass doesn't look visibly crooked. I'm wondering whether th...
Steering wheel vibrates only in a narrow highway-speed band. Below it: almost nothing. Faster: less noticeable again. Tire pressures match, no vibration under braking. I am thinking wheel balance and tire/wheel condition...
My car has started making a brief squeal on the first two or three brake applications after sitting overnight. After that it is quiet for the rest of the drive. Braking feels normal and there is no steering shake. It see...
There's a slight oily film around a gasket, but no puddle under the car and the oil level hasn't noticeably dropped between checks. A mechanic mentioned it during routine service without saying it was urgent. I don't wan...