Pohjannaula

Read-only diagnostics for Polestar 2 & Volvo CMA

Read battery health, vehicle info, and trouble codes straight from your car — entirely on your device. No account, no servers, nothing sent to the cloud.

Battery

State of health, charge, pack voltage, cell voltages, temperatures, 12V system.

Vehicle

VIN, odometer, service intervals, key position, uptime.

Trouble codes

Scan every ECU and read fault codes with descriptions.

Live data

Poll drivetrain, battery, and thermal sensors in real time.

Tools

ECU presence map and a Data Identifier sweep.

Demo mode

Explore the whole app with sample data — no car needed.

What you need

A USB / OBD‑II–to‑Ethernet (ENET) adapter to connect to the car. The app is read-only — it cannot change any vehicle setting. See Support for setup.

Pohjannaula is an independent tool and is not affiliated with, endorsed by, or sponsored by Polestar or Volvo. "Polestar" and "Volvo" are trademarks of their respective owners; they are used only to describe vehicle compatibility.