Diagnose Car Problems Instantly
Free AI tool using symptoms or OBD-II codes
Instantly diagnose engine, fuel, electrical, and charging problems for petrol, diesel, hybrid, and electric vehicles — no signup required.
Carithm is a free AI car mechanic that helps you diagnose vehicle issues using natural language or OBD-II codes like P0300, P0171, and P0420. Get precise causes, repair steps, and recommendations instantly.
🔧 How Carithm Works
Enter symptoms like "engine won't start" or input OBD-II codes, and Carithm provides diagnostics, likely causes, and actionable repair guidance for issues such as misfires, check engine lights, fuel system problems, and sensor failures.
No login required. Fully functional on mobile, tablet, and desktop. Works across petrol, diesel, hybrid, and electric vehicles — free to use for all drivers and mechanics.
🧪 Try phrases like:
- "Engine cranks but won’t start"
- "OBD-II code P0174"
- "Car is not accelerating uphill"
- "EV won’t charge properly"
About Carithm AI
Carithm AI is a virtual AI car mechanic that helps troubleshoot engine, fuel system, and electrical issues. Using natural language or OBD-II codes like P0300, P0171, and P0420, it provides accurate diagnostics, probable causes, and step-by-step repair guidance.
Carithm AI uses advanced algorithms trained on real-world repair data to provide probable causes and step-by-step fixes.
This tool works for car enthusiasts, everyday drivers, and mechanics. Supported vehicles include petrol, diesel, hybrid, and electric. Your data is secure, and no signup is required.
Unique Features
- Full OBD-II code decoding for standard P0xxx and P1xxx codes
- Step-by-step AI-guided diagnostics
- Instant use on mobile, tablet, and desktop
- Supports natural language input for troubleshooting
- Links to VIN Decoder and Car Blog for extra guidance
FAQ
Is Carithm free to use for a car diagnostic check?
Yes! Carithm offers a 100% free car diagnostic check with no signup or ads. Get instant AI-driven guidance for your vehicle’s issues, just like having a mechanic on your phone.
Can I use Carithm with OBD-II codes?
Absolutely — Carithm supports codes like P0420, P0171, P0300, and more. It explains causes, step-by-step fixes, and helps identify issues such as a sign of a bad fuel injector or faulty fuel pump symptoms.
Why would my check engine light come on?
There are many reasons your check engine light may appear, including misfires, sensor failures, or fuel system problems. Carithm helps you understand the cause and provides a free diagnostic check to pinpoint the exact issue.
My car makes a grinding noise when braking — what could this mean?
Signs of a bad starter include clicking noises when turning the key. Learn more about related car starting and battery issues in our Car Blog.
How do I know if my starter is failing?
Signs of a bad starter include clicking noises when turning the key or the engine failing to crank. Carithm explains signs of a bad starter and offers guidance on next steps.
Is there a mobile app or APK for Carithm?
Currently, Carithm is web-only and works perfectly on mobile and desktop browsers, giving you instant access to free car diagnostic checks anytime, anywhere.
Does Carithm function as a virtual mechanic chat?
Yes! Describe your car problems in plain language and Carithm AI provides detailed, step-by-step solutions — from diagnosing your check engine light to identifying symptoms of fuel or starter issues.