Maryland emissions
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
As long as the engine and exhaust system is up to operating temps should pass in any mode. Most likely it will be an electronic test using OBD port with no tailpipe emission collection.
Moderator
Joined: Feb 2006
Posts: 39,161
Likes: 18,003
From: DFW Area TX
Maryland Emission Test is nothing more than reading the various emission devices status via the ODBII connector. Exhaust setting will make no difference. There is no tailpipe "sniffer".
What is the Right Test for Your Vehicle?
On-Board Diagnostics (OBD) Test
•The On-Board Diagnostics (OBD) test is required for: ◦Model year 1996 and newer passenger vehicles and light duty trucks.
◦Model year 2008 and newer heavy duty vehicles up to 14,000 pounds.
•The OBD test uses a scan tool to connect to the vehicle's On-Board Diagnostics computer. The connector is usually located under the dashboard.
•The system is checked to determine if there are emissions control components that are failing which may cause the vehicle's emissions to exceed allowable limits.
•Make sure the amber-colored OBD "check engine" or similar warning light is not illuminated or the vehicle will fail the OBD test. If the light is on, you should see your dealer or repair technician before coming in for the test.
•If the vehicle has had recent repairs that required the battery to be disconnected, drive the vehicle in a normal manner for one week to reset the emissions monitors before bring the vehicle in for the OBD test.
On-Board Diagnostics (OBD) Test
•The On-Board Diagnostics (OBD) test is required for: ◦Model year 1996 and newer passenger vehicles and light duty trucks.
◦Model year 2008 and newer heavy duty vehicles up to 14,000 pounds.
•The OBD test uses a scan tool to connect to the vehicle's On-Board Diagnostics computer. The connector is usually located under the dashboard.
•The system is checked to determine if there are emissions control components that are failing which may cause the vehicle's emissions to exceed allowable limits.
•Make sure the amber-colored OBD "check engine" or similar warning light is not illuminated or the vehicle will fail the OBD test. If the light is on, you should see your dealer or repair technician before coming in for the test.
•If the vehicle has had recent repairs that required the battery to be disconnected, drive the vehicle in a normal manner for one week to reset the emissions monitors before bring the vehicle in for the OBD test.
