What is the difference between the OBD II and the existing treadmill tests?
The treadmill test measures the concentration of gases coming from the vehicle’s exhaust pipe. The OBD II test is an electronic test that uses a hand-held reader device plugged into the vehicle’s computer through a port mounted under the dash. The vehicle’s computer will communicate if there are any components that are deteriorating or failing that may cause the vehicle to exceed allowable emissions limits.
