Three simple steps to understanding your check engine light
Enter your car make, model, and the diagnostic code displayed on your OBD-II scanner. Don't have a scanner? Learn how to get your code or use TrunkMonkey AI to scan it instantly.
Search NowGet detailed, easy-to-understand explanations of what your code means, common causes, symptoms, and whether it's safe to keep driving. Knowledge is power.
See ExampleFor advanced AI-powered analysis, download TrunkMonkey AI. Get instant diagnosis, repair estimates, and step-by-step guidance right on your phone.
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Use our homepage search to find information about specific OBD-II codes. Just enter your car's make, model (optional), and the code like P0420 or P0300. We'll show you everything you need to know about that code.
Not sure what code you have? Browse our extensive library of codes organized by car manufacturer. Find the most common codes for Toyota, Honda, Ford, Chevrolet, and more.
Learn the basics with our educational guides covering everything from what a check engine light is to how to read diagnostic codes yourself. Perfect for DIY enthusiasts.
Stay informed with our latest articles covering automotive news, maintenance tips, seasonal advice, and solutions to common car problems.
Go beyond basic code lookup with AI-powered diagnostics
TrunkMonkey AI doesn't just tell you what a code means - it analyzes your specific vehicle, driving conditions, and related codes to give you personalized insights.
No OBD-II scanner? No problem. TrunkMonkey AI can scan your check engine light directly using your smartphone camera (select vehicles) or connect to affordable Bluetooth scanners.
Get accurate repair cost estimates based on your location and vehicle. Know what to expect before you visit the mechanic.
Connect with trusted, certified mechanics in your area. Read reviews, compare prices, and book appointments right from the app.
Keep a complete history of your vehicle's diagnostic codes, repairs, and maintenance. Perfect for tracking recurring issues or maintaining resale value.
Get notified when it's time for routine maintenance or if a stored code becomes urgent. Stay ahead of problems before they become expensive.
Both are valuable - here's how they compare
Our recommendation: Use the website for learning and basic lookups, then download TrunkMonkey AI for instant, personalized diagnostics.
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