Ontario's DriveON program does not require an emissions test on every renewal or every sale. A heavy-duty diesel commercial motor vehicle needs testing when one of the official triggers is met.
A heavy-duty diesel commercial motor vehicle with a Registered Gross Weight (RGW) over 4,500 kg needs an emissions test when it is being registered by a new owner and the vehicle is older than the current model year, or when it is at least 7 model years old and the plate sticker is being renewed.
In 2026, a 2019 model-year vehicle is seven model years old. The vehicle must still meet the applicable diesel, commercial-use and RGW criteria before you treat it as due for a renewal-triggered emissions test.
Ontario's heavy-duty diesel emissions-test requirement applies to qualifying commercial motor vehicles with an RGW over 4,500 kg. Vehicles at or below that RGW are outside this specific heavy-duty emissions-test requirement. RGW is the figure on the vehicle permit. GVWR is the manufacturer's rated maximum and is used for other procedure details, including OBD eligibility — it is not a substitute for checking RGW.
DriveON uses opacity testing for qualifying heavy-duty diesel vehicles. An additional OBD inspection applies to eligible vehicles based on model year and GVWR, including 2007-and-newer vehicles up to 6,350 kg GVWR and 2016-and-newer vehicles above 6,350 kg GVWR (confirm the current DriveON emissions directive for the exact pass/fail vs data-collection treatment on heavier units).
Do not describe OBD as a simple replacement for the opacity (tailpipe) test. Opacity remains central for qualifying heavy diesels; OBD is added where the directive requires it.
This page answers the GTA-wide question “does this truck need a test?” with the provincial triggers and the opacity/OBD relationship. Fleet calendar pages focus on tracking those triggers across many units; corridor pages focus on where mobile testing fits geographically.
Related guides: GTA 400-series coverage and multi-yard testing day. Book through Piotr Service.
