Tell us what’s happening with your car. We’ll help you decide what to do next.

Answer 2–3 questions about a symptom. Get the likely causes with evidence, a clear drive-or-stop verdict, and cost ranges — in about two minutes.

General guidance for common problems — not a substitute for inspection.

Choose your symptom

Car Won’t Start
Clicking, silence, cranking but not firing, or dead after sitting.

~2 min
Brake Pedal Goes to the Floor
The pedal sinks too far. With a warning light or visible fluid, this is urgent.

~2 min · Safety-critical — can end in a stop-driving verdict
Brake Noise — Squeal to Grinding
Squealing or grinding when you brake. Wear warning or metal on metal?

~2 min
Coolant Leak
Visible leak, running hot, or coolant disappearing with no puddle.

~2 min · Safety-critical — overheating can destroy an engine
ABS Warning Light
The ABS light is on. What it means — and when it pairs with the red brake light.

~2 min

Choose your symptom — pick what your car is doing.
Answer two or three questions — plain language, no tools needed.
Get your decision — likely causes with evidence, a drive-or-stop verdict, safe checks you can do now, and labeled cost ranges.

Every verdict shows its reasoning and its sources.

Drive or stop? — a clear verdict with the conditions behind it.
What’s most likely — and what’s ruled out? — causes ranked with evidence for and against.
What can I check safely right now? — step-by-step checks with explicit stop points.
What will it cost, roughly? — labeled estimate ranges with uncertainty, not false precision.

Structured decision trees built from manufacturer and technical sources — read the methodology.
The year, make, and model you save stays on your device for reference only — it does not change the reasoning, and we never claim vehicle-level intelligence we don’t have.
Possible cause is not a confirmed diagnosis. Only testing confirms a diagnosis — never a page.
When the evidence points to danger, we say stop driving — plainly, and never softened.