What Is OBD-2?
On-Board Diagnostics II (OBD-2) is a standardised vehicle diagnostics protocol required on all US cars and light trucks since 1996 and on EU vehicles since 2001. The 16-pin J1962 connector — usually under the dashboard — gives access to engine data, emission readings, and diagnostic trouble codes.
Types of Fleet OBD-2 Devices
- Plug-and-play dongles — self-install in 30 seconds. Best for light-duty fleets. Examples: Zubie, Automile, Bouncie.
- Hardwired trackers — permanent install with backup battery. Tamper-resistant. Examples: Geotab GO9, CalAmp.
- Bluetooth adapters — connect to a driver's phone app. Low cost but depend on phone presence. Best for personal vehicles in BYOD programmes.
- Heavy-duty adapters — J1939/J1708 connectors for Class 6–8 trucks, buses, and equipment.
Data Available Through OBD-2
| Data Point | Use Case |
|---|---|
| Engine RPM | Idle-time monitoring, fuel waste |
| Vehicle speed | Speeding alerts, trip reconstruction |
| Coolant temperature | Overheat early warning |
| Fuel system status | Fuel efficiency analysis |
| DTCs (trouble codes) | Remote diagnostics, predictive maintenance |
| Odometer / trip distance | Mileage-based PM triggers |
How to Choose a Device
Match the device to your fleet mix. A courier service with 30 Ford Transits needs simple plug-and-play OBD-2 dongles. A construction company with excavators, dump trucks, and pickup trucks needs a vendor that supports both J1962 and J1939, plus asset trackers for unpowered trailers.
Questions about fleet management?
We're happy to help you find the right solution for your fleet.
Contact Us