In Final Testing — Launching Soon
Understand Your Check Engine Light in Plain English
Connect your ELM327 OBD-II adapter and get AI-powered diagnostics in seconds. Know exactly what that warning light means and what to do about it.
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Check Engine Insights
AI-Powered Diagnostics
P0420
Catalyst Efficiency
Your catalytic converter may not be working efficiently...
Everything You Need to Understand Your Car
From basic code reading to AI-powered diagnostics, we make vehicle troubleshooting accessible to everyone.
Plain English Explanations
No more confusing codes. Get clear, easy-to-understand explanations of what's happening with your vehicle.
AI Diagnostic Reports
Our AI analyzes your specific situation and provides personalized repair recommendations with cost estimates.
VIN Detection
Automatically reads your Vehicle Identification Number to provide vehicle-specific diagnostic information.
Recall Alerts
Stay informed about open safety recalls for your specific vehicle based on VIN lookup from NHTSA.
Real-Time Metrics
Monitor engine RPM, coolant temperature, vehicle speed, and 50+ other parameters in real-time.
ELM327 Compatible
Works with any standard ELM327 Bluetooth OBD-II adapter. No proprietary hardware required.
Get Started in Three Simple Steps
No technical expertise required. If you can plug in a USB cable, you can diagnose your car.
Plug In
Connect your ELM327 Bluetooth OBD-II adapter to your vehicle's diagnostic port (usually under the dashboard).
Scan
Open the app and tap scan. We'll automatically connect to your adapter and read any diagnostic trouble codes.
Get Report
Receive a plain English explanation of any issues, along with AI-powered repair recommendations and cost estimates.
Tested & Approved Adapters
Not all OBD-II adapters are created equal. We look for genuine ELM327 chips and Bluetooth Low Energy (BLE) support — the combination that delivers fast, reliable connections with minimal battery drain.
Veepeak OBDCheck BLE+
Reliable Bluetooth Low Energy adapter with broad vehicle compatibility. Genuine ELM327 chip with fast, stable connections.
Vgate iCar Pro BLE
Compact, low-power adapter with excellent connection stability. Supports all standard OBD-II protocols out of the box.
Also Compatible
Veepeak OBDCheck BLE
Budget-friendly BLE adapter from Veepeak. Solid basic option that handles standard diagnostics well.
Vgate vLinker MC+
Feature-rich adapter with broad protocol support. Good choice for users who want extra flexibility.
Generic OBD-II BLE Adapter
Basic unbranded BLE adapter. Works for standard scans, though connection stability can vary between units.
Any ELM327-compatible BLE adapter should work, but these are the ones we've verified firsthand for the best experience.
Diagnostic Reports That Actually Make Sense
Our AI doesn't just tell you the code definition. It analyzes your specific vehicle, driving conditions, and common failure patterns to give you actionable insights.
- Vehicle-specific repair guidance
- Cost estimates based on your location
- Safety assessment and drive recommendations
- Step-by-step diagnostic procedures
P0420
2018 Honda Civic 1.5L Turbo
What's Happening
Your catalytic converter isn't cleaning exhaust gases as efficiently as expected. The downstream oxygen sensor is detecting more pollutants than normal.
Most Likely Causes
- Failing catalytic converter65%
- Exhaust leak before converter20%
- Faulty O2 sensor15%
This issue affects emissions but won't damage your engine. Schedule repairs within 2-4 weeks.
Estimated Cost
$350 - $1,200
Parts + labor in your area
Simple, Transparent Pricing
Start for free. Pay only when you need an AI diagnostic report.
Free
Everything you need for basic diagnostics.
- Unlimited DTC code scans
- Plain English explanations
- Basic severity ratings
- VIN detection
- Vehicle recall alerts
- Real-time metrics
Most Popular
Pay Per Report
Get a detailed AI report when you need it.
- Everything in Free
- AI-powered diagnostic report
- Detailed repair recommendations
- Cost estimates for your area
- Safety assessment
- No subscription required
Pay only when you need a report
Best Value
Pro
Unlimited AI reports for serious diagnostics.
- Everything in Free
- Unlimited AI reports
- Detailed repair recommendations
- Cost estimates
- Priority support
- Full report history
7-day free trial. Cancel anytime.
Frequently Asked Questions
Everything you need to know about getting started.
OBD-II (On-Board Diagnostics II) is a standardized system in all cars sold in the US since 1996. An ELM327 adapter plugs into your car's OBD-II port (usually under the dashboard) and communicates wirelessly with your phone via Bluetooth.
Be the First to Try Check Engine Insights
We're in final testing and launching soon. Join the waitlist to get early access and be notified the moment the app is available.
Free to start · iOS & Android · Works offline