The Drive Clean program is changing on January 1st, 2013 - here's what you need to know:

  • Vehicles will no longer be driven on a dynamometer. (Also referred to as a "dyno")
  • All vehicles 1998 and newer will be tested via the onboard diagnostic port. The Drive Clean machine will search for any diagnostic trouble codes (present if your engine light is on!) and it will check to make sure all of your on-board monitors are at a "ready" status. In English, if your engine light is on, your vehicle will probably fail the emissions test. If your engine light is cleared before bringing it in for the test, your vehicle will fail because the monitors will not be in a "not ready" status.
  • All vehicles 1997 and older will be tested using the "two speed idle" test. An exhaust probe is inserted in the tailpipe, the vehicle is revved up to 2500 rpm, and sample of the gas exiting the tailpipe is taken.
  • The repair cost limit / conditional pass limit will remain the same at $450
  • The Drive Clean test fee will remain the same at $35


How To Re-set Your Computer Monitors

  1. Make sure the vehicle has been parked for eight hours without a start.
  2. Start the engine and let it idle for two-and-a-half minutes with the Air Conditioning and rear defroster on.
  3. Turn the A/C and rear defrost off. Drive the vehicle for 10 minutes at highway speeds.
  4. Drive the vehicle for 20 minutes in stop-and-go traffic.
  5. Your drive cycle is complete. You can now go in for your test.

*Please be aware that this is a generic drive cycle, and while it will work for most vehicles, it will not work for all. If this doesn't work for your vehicle, give us a call and we'll give you a specific drive cycle for your vehicle*
Why Change The Program?

  •  The current program has worked extremely well for reducing greenhouse gases. (see Drive Clean Emissions Program Benefit Analysis, 2010 at
    As vehicles continue to become more sophisticated, a better way of testing the emissions is available to us.


  • The on-board computers are now capable of monitoring the emissions, so instead of checking the physical emissions from the tailpipe, we can now check to make sure all on-board monitors are functioning correctly. Testing this way allows us to have a better overall perspective of the emissions being emitted, and will help reduce greenhouse gases even further.
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