First app that actually works
Paired on the first try and told me what P0171 actually meant for my car. That’s all I wanted. Used a cheap ELM327 from Amazon. No fighting with settings. Understandable for regular people.
Free
In-App Purchases
About
Decode your car's check engine light with AI. Get plain-language explanations of trouble codes, likely causes, and urgency. Monitor live sensor data and track your car's history.
✓Plain-language verdict for trouble codes
✓AI explanations of fault codes
✓Live sensor monitoring (RPM, temp, etc.)
✓Car diagnostic history tracking
✓Support for multiple vehicles
✓Demo mode for pre-purchase testing
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What's New in OBD2 Car Scanner ELM327
1.4.1
October 7, 2026
• More reliable connection and code reading on older cars that use the K-Line protocol. • If a check is interrupted, “Try again” now reconnects to the car, on both Bluetooth and Wi-Fi. • Clearing codes: Cavox re-reads the car to confirm the result and tells you if it couldn't be confirmed, so you can try again. • More accurate results when the car answers only part of a check: Cavox now tells you the check is incomplete. • Bug fixes and stability improvements.
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Subscriptions & In-App Purchases
Cavox Premium Monthly
Full access to advanced diagnostics & coding
$24.991 Month
User reviews
FAQ
What is Cavox?
Cavox is an OBD2 car scanner app that uses AI to provide plain-language explanations for check engine lights and diagnostic trouble codes. It also offers live sensor monitoring and vehicle history tracking.
How does Cavox work?
Cavox connects via Bluetooth to a standard OBD-II / ELM327 adapter. It reads fault codes, provides AI-driven verdicts on their meaning and urgency, and can monitor live sensor data.
Is Cavox free to use?
The core verdict feature of Cavox is free. A Premium subscription is required to unlock full AI diagnosis, live monitoring, and saved history.
What are the Cavox Premium subscription plans?
Cavox offers two premium subscription plans: Cavox Premium Monthly at $24.99 and Cavox Premium Yearly at $99.99.
Does Cavox have ads?
No, Cavox does not contain advertisements. The app is free to use for basic diagnostics with an optional premium subscription for advanced features.
What devices does Cavox support?
Based on the provided data, Cavox currently supports iPhone devices.
How often is Cavox updated?
The latest version of Cavox is 1.3.1, last updated on August 7, 2026. This indicates a recent update frequency.
Can I use Cavox while driving?
No, Cavox explicitly states that users should always stop their vehicle before running diagnostics and should not use the app while driving. It is a diagnostic aid, not a tool for use on the road.
