Smog Check Test and Repair

Smog Checks help keep California's air clean and your vehicle running smoothly. Regular inspections check that your vehicle meets emissions standards. They also identify needed emissions repairs, helping you avoid costly problems later on. 

How to Prepare?

• Bring your DMV registration renewal notice with you to your appointment, if available. This helps us verify your vehicle information.

• If your vehicle's check engine light is on, get it repaired before your Smog Check. The check engine light indicates a problem with the vehicle's emissions system. A vehicle will not pass a Smog Check with the check engine light on. We can help you with any needed repairs.

• If you recently disconnected or replaced your battery, drive your vehicle for a week or two. This will allow the readiness monitors to reset before your Smog Check.

• If your vehicle's software is modified, restore it to the manufacturer's original settings. You may also restore it to a version approved by the California Air Resources Board. Modified or non-approved software will cause a vehicle to fail a Smog Check.

What happens during the inspection?

A Smog Check may include:

• Visual inspection of the emissions control system

• Functional inspection of the emissions control system

• On-board diagnostic system check (for most 2000 and newer model year vehicles)

• Tailpipe emissions test (for pre-2000 model year vehicles)

• The inspection usually takes about 30 minutes.