Piston

Diagnose your car's issues quickly and easily with Piston, your mobile OBD2 diagnostic tool. Instantly access vital car information, turning your smartphone into a powerful car scanner.

Worried about that Check Engine Light (MIL)? Piston reads and displays Diagnostic Trouble Codes (DTCs) and Freeze Frame data, providing crucial insights to pinpoint and resolve the problem. Simply connect a Bluetooth or Wi-Fi ELM327 adapter to your vehicle's OBD2 port; Piston guides you through the seamless connection process. Instructions are available on the Home page after initial installation or within the Settings menu at any time.

Piston empowers you to:

• Read and clear OBD2-standard Diagnostic Trouble Codes (DTCs)
• Examine Freeze Frame data (sensor readings at the moment of malfunction detection)
• Monitor real-time sensor data
• Check Readiness Monitor status (emission control system monitoring)
• Save DTC history locally
• Save DTC history to the cloud (requires login)
• View sensor data charts
• Export real-time sensor data
• Retrieve your vehicle's VIN
• Access ECU details (OBD protocol, PID count)

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

This app requires a separate ELM327 Bluetooth or Wi-Fi adapter to function as a car scanner. Piston supports OBD-II (OBDII, OBD2), and EOBD standards. OBD2 compliance is mandated for US vehicles since 1996. In the EU, EOBD was mandated for petrol cars from 2001 and diesel cars from 2004. Australia and New Zealand require OBD2 for petrol cars from 2006 and diesel cars from 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 (Aug 2, 2024)

• Android 14 support
• Improved Sensor Selection Screen
• Support for additional sensors (vehicle-dependent)