Portland Emissions Test

Oregon's Vehicle Inspection Program requires passing tests for gas, alternative fuel and hybrid vehicles from 1975 onward that are registered within Portland's testing boundaries, as well as light diesels weighing up to 8,500 lb. Registration of your car determines its boundary, so check the DEQ boundary lookup and review the testing boundaries page if you are close to an edge. The test does not apply to vehicles in their newest four model years. You can find statewide rules on the Oregon emissions test page.

The DEQ fees page shows accepted payment methods: money order, cash, debit or credit card. Separate fees apply for registration. A car must be 4 model years old or older for DEQ Too; the test methods page lists the remaining conditions. According to the DEQ new to Oregon FAQ, cars from 1996 onward get an OBD test, while older cars get a tailpipe test.

Locations listed on the DEQ Vehicle Inspection page include Clackamas, Gresham, NE Portland, Sherwood, Sunset / Hillsboro and Scappoose. Five stations open Tuesday, Thursday and Friday 8:30 in the morning through 5:30 in the evening. Wednesday runs until 7 in the evening, Saturday until 1 in the afternoon, and Sunday and Monday are closed. At Scappoose, Friday and Saturday are the only open days. Vehicles over 20 feet cannot be tested there. You don't need an appointment, and each test takes five to eight minutes. The busiest days are Tuesdays and Saturdays. Wait-line cameras are available online. For other locations, see the emissions test by city list.

If the check engine light is on, most cars will not pass, though DEQ provides free re-tests. Clean Air Partners Program eligibility may apply to low-income Portland-area drivers whose 1996 or newer car failed the OBD test and requires minor repairs. Learn what to do after a fail.