How Often Does a Transport Truck Need an E-Test in Ontario? A Straight Answer: Roadside smog patrol teams also got more authority to catch violations in real time. These teams drive around with mobile equipment and can pull a truck over for a spot check at almost any moment. If your truck shows signs of tampering, you could face penalties separate from a failed emissions test in Ontario. That's a costly mistake nobody wants on their record. https://ourfathersfamily.com/blogs/137493/How-Often-Does-a-Transport-Truck-Need-an-E-Test