Yes. HOS247 uses the Pacific Track PT40, a continuously connected device certified by CARB and listed on the official CARB OBD Test Devices page .
Continuously connected devices for Clean Truck Check plug directly into the vehicle’s diagnostic port—no professional installation required.
Yes. Emissions tests require the engine to be on and idling.
No. The device captures emissions data only when the vehicle is idling, not while driving.
No. Emissions tests run automatically while the vehicle is idling and do not require any input or action from the driver.
The device transmits only the vehicle emissions data required by CARB for the Clean Truck Check test. No location data is included.
Effective January 1, 2025, most heavy-duty vehicles are required to complete two emissions tests per year. Starting in 2027, the required number of annual emissions tests will increase from two to four per vehicle.
Yes. The system allows operators to set and update the required testing frequency for each vehicle at any time.