What's wrong with your car?

Describe your vehicle problem or OBD code. We'll search mechanic communities, technical databases, and NHTSA records to diagnose the cause and write a repair guide — completely free.

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Example problems

Check engine light P0420

Check engine light on. OBD scan: P0420. 2018 Toyota Camry, 78k miles.

Grinding noise when braking

High-pitched metal grinding when applying brakes. Started after a highway drive. Worse on front wheels.

Engine misfires at idle

Car shudders and feels rough at idle. RPMs bounce 600–900. Sometimes stalls at red lights.

These results are based on community knowledge and AI analysis. Always take appropriate safety precautions and consult a certified mechanic for complex or safety-critical work.