Jump to main content.

Inspection & Maintenance (I/M)

Search for Documents

Search the Document Index System (DIS) database to find:

  June 25, 2012 EPA has updated the 2011 I/M OBD Readiness Testability Issues List to correct its OBD testing guidance for model year 1996-98 Mitsubishi vehicles.

Best Practices

Vehicle inspection and maintenance programs (I/M) help improve air quality by identifying high-emitting vehicles in need of repair (through visual inspection, emissions testing, and/or the downloading of fault codes from a vehicle's onboard computer) and causing them to be fixed as a prerequisite to vehicle registration within a given non-attainment area.  The 1990 Amendments to the Clean Air Act made I/M mandatory for several areas across the country, based upon various criteria, such as air quality classification, population, and/or geographic location.

Regulations Policy Guidance
On-board Diagnostics Technical Guidance & Test Procedures
Tampering and Warranty State Status
Remote Sensing Program Evaluations
Archive: Older Files & Publications

Contact:  Dave Sosnowski at 734-214-4823 or sosnowski.dave@epa.gov

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
For more: About Us | Get E-mail Updates | Browse the A to Z Subject Index.

Local Navigation

Jump to main content.