Add vehicle context
Start with year, make, model, mileage, or VIN so the diagnostic can separate generic symptoms from vehicle-specific patterns.
AI mechanic
Free AI Car Diagnostic Tool
Troubleshoot car symptoms, OBD2 check engine codes, and vehicle-specific clues before you book a repair. WrenchConnect turns what you know into focused diagnostic questions and practical next steps.
Free to startOBD2 code awareYear/make/model prompts
How it works
How the AI Mechanic Works
Describe the symptom
Enter what changed, when it happens, sounds, smells, warning lights, and whether the car still drives normally.
Answer follow-ups
The AI mechanic asks targeted questions to narrow the issue instead of jumping straight to a parts list.
Get next steps
See likely causes, urgency, and what to tell a mechanic if the repair needs hands-on inspection.
Codes and context
Diagnose Check Engine Codes
A code is a clue, not a repair order. The AI diagnostic combines the code with symptoms, mileage, vehicle details, and driving conditions so it can separate a likely sensor issue from a misfire, fuel trim problem, EVAP leak, or catalyst fault.
Enter the exact OBD2 code if you have it. If you do not, describe the warning light and what the car is doing, then the tool will guide the next questions.
Start with a symptom
Troubleshoot fasterLaunch free AI diagnostic
Enter Your Car's Symptoms
Describe the problem in plain language: when it started, whether it happens at idle or highway speed, any noises, smells, leaks, lights, recent repairs, and the vehicle details you know.
If the car is overheating, brakes are grinding, or the check engine light is flashing, treat it as urgent and avoid driving until it is checked.
The tool is diagnostic guidance, not a safety inspection. Use it to prepare better questions and find the right repair path.