Add the vehicle
Start with year, make, model, and VIN when available, so the result has the right context.
Whether you have trouble codes, symptoms, or both, the system walks you through a structured diagnostic process and gives you an actionable answer in seconds.
Start with year, make, model, and VIN when available, so the result has the right context.
Single codes, multiple codes, raw text, or symptom-only mode. No scanner required.
Rough idle, no-start, overheating, poor shifting, reduced power, or intermittent behavior all matter.
Safe to drive, short trip only, avoid highway, tow recommended, or do not drive.
Owner checks and shop checks are separated, so you don't replace the first sensor blindly.
Shops see the codes, symptom timeline, likely causes, and test path in one place.
Don't have a code reader? Just describe what your vehicle is doing. Our AI cross-references symptom patterns against thousands of diagnostic cases to speculate likely root causes, suggest probable codes, and give you comprehensive repair specs.