Diagnose your car's issues quickly and easily with Piston, your mobile OBD2 diagnostic tool. Instantly access vital car information right from your smartphone or tablet.

Is that Check Engine Light (MIL) flashing? Piston transforms your mobile device into a powerful car scanner, reading Diagnostic Trouble Codes (DTCs) and Freeze Frame data to pinpoint the problem. This detailed information helps you understand and fix the issue efficiently.

You'll need an ELM327 Bluetooth or WiFi adapter, which connects directly to your vehicle's OBD2 port. Piston provides clear, step-by-step connection instructions accessible from the Home page after installation or within the Settings menu at any time.

With Piston, you can:

• Read and clear OBD2 standard Diagnostic Trouble Codes (DTCs)
• Analyze Freeze Frame data (a record of sensor readings when a malfunction occurred)
• Monitor real-time sensor data
• Check Readiness Monitor status (for emission control systems)
• Save DTC history locally
• Save DTC history to the cloud (requires login)
• View sensor data charts
• Export real-time sensor data
• View your car's VIN number
• Examine ECU details, including OBD protocol and PID count

Note: Some features are Premium and require a single, one-time in-app purchase. No subscriptions!

Piston requires a separate ELM327 Bluetooth or WiFi adapter to function as a car scanner. It's compatible with OBD-II (OBDII, OBD2), and EOBD standards.

OBD2 compliance: US vehicles since 1996, EU petrol vehicles since 2001, EU diesel vehicles since 2004, Australian and New Zealand petrol vehicles since 2006, and Australian and New Zealand diesel vehicles since 2007.

Important: Piston only accesses data your vehicle provides via the OBD2 standard.

Questions or suggestions? Contact us at [email protected]

What's New in Version 3.8.0

Last updated August 2, 2024

• Android 14 support
• Improved Sensor Selection Screen
• Support for additional sensors (availability may vary by vehicle)