Emissions testing in Loveland happens at state-certified stations, not at the DMV or repair shops

Loveland is in Larimer County, which requires emissions testing for most vehicles registered there. You cannot test at a random repair shop — the station must hold a Colorado Department of Public Health and Environment (CDPHE) emissions testing certificate. The test itself takes 10 to 15 minutes and costs between $25 and $35, depending on the station.

Your vehicle needs a test before you can renew your registration if it was built in 1981 or later and you live in the Denver metro area or northern Front Range (which includes Loveland). Vehicles from 1980 and earlier, diesel trucks, and motorcycles are exempt. You can test any time during your registration year, but many people wait until close to their renewal important date — which means lines get longer in the weeks before expiration.

The test measures tailpipe emissions: hydrocarbons, carbon monoxide, and nitrogen oxides. Your vehicle either passes or fails. If it fails, you get a report showing which pollutants exceeded the limit. You then have 60 days to fix the problem and retest at no additional charge at the same station.

Key Takeaways

  • Only CDPHE-certified stations can perform emissions tests in Loveland; you can find the current list on the Colorado Department of Revenue website.
  • The test costs $25 to $35 and takes 10 to 15 minutes; you need it before renewing your registration if your vehicle was built in 1981 or later.
  • If your vehicle fails, you have 60 days to repair it and retest at the same station for free.
  • You can test any time during your registration year, but testing early avoids the rush in the weeks before your renewal important date.

Finding a certified testing station in Loveland

The Colorado Department of Revenue maintains a searchable list of all certified emissions testing stations. Go to the CDPHE Air Pollution Control Division website or call the Larimer County Health Department at (970) 498-6300 to ask which stations near you are currently active and accepting walk-ins.

Most stations in Loveland are independent repair shops or quick-lube facilities that have obtained their certification. Call ahead before you go — some stations have limited hours, take appointments only, or stop accepting tests an hour before closing. A few stations in the area also offer registration renewal services, which can save you a second trip.

Stations in Fort Collins and other parts of Larimer County will test your Loveland-registered vehicle, so you are not limited to Loveland itself if another location is more convenient.

What to bring and what happens during the test

Bring your vehicle registration or proof of ownership and a valid photo ID. The technician will enter your vehicle information into the state system, connect a probe to your tailpipe, and run the test. You will see the results on a printout before you leave.

The test measures emissions at idle and at a simulated highway speed (the dynamometer spins your wheels while your vehicle stays in place). If your vehicle passes, the station uploads the passing result to the state when ready, and you can renew your registration online or at the DMV. If it fails, the printout shows which pollutants were over the limit and by how much. You do not need to do anything when ready — you have 60 days to repair the vehicle and return to the same station for a retest.

Your vehicle must be in running condition to test. If it will not start or is making severe noises, the station may refuse to test it. If you have recently filled your gas tank, changed your oil, or had work done on the engine, wait a few days before testing — a fresh oil change or full tank can sometimes affect results slightly.

What to do if your vehicle fails the emissions test

A failure report lists the specific pollutants that exceeded limits. Common reasons for failure include a faulty oxygen sensor, a loose gas cap, a clogged air filter, or a malfunctioning catalytic converter. The report does not tell you what to fix — it only tells you what is wrong. You will need to take the vehicle to a repair shop to diagnose and fix the underlying problem.

You have 60 days from the test date to repair the vehicle and retest at the same station. The retest is free. If you repair the vehicle and it passes the retest, the passing result is sent to the state and you can renew your registration. If it fails again, you have another 60 days to make further repairs and retest again.

If you cannot afford repairs or the repair cost exceeds a certain threshold, Colorado offers a waiver program. After two failed tests, you may be able to get a waiver that allows you to register your vehicle without passing. Contact the Larimer County Health Department to learn whether you meet the income and repair-cost requirements for a waiver.

Timing your test before registration renewal

Your registration renewal notice will show your expiration date. You can test any time during the 12 months before that date, but the state system will not let you renew your registration online until you have a passing test on file. If you test in the last week before expiration and fail, you will have only a few days to repair and retest before your registration expires — and driving with an expired registration can result in a traffic stop and fine.

Testing two to three months before your renewal important date gives you time to repair and retest if needed, and still renew on time. If you are close to your important date and have not tested yet, go to a station that takes walk-ins and has short wait times, or call ahead to schedule an appointment.

Once you have a passing test result, you can renew your registration online through the Colorado Department of Revenue website, by mail, or in person at a DMV office. You do not need to bring the test printout to the DMV — the result is already in the state system.

Vehicles exempt from Loveland emissions testing

Motorcycles, mopeds, and vehicles from 1980 and earlier do not need emissions tests in Loveland. Diesel trucks and vehicles over 14,000 pounds gross vehicle weight rating (GVWR) are also exempt, though they may need other inspections.

If you own a vehicle that is normally exempt but you are unsure whether yours qualifies, call the Larimer County Health Department or ask the station when you arrive. Some vehicles have borderline model years or weights, and the technician can confirm your vehicle's status before you pay for a test you do not need.

Frequently Asked Questions

Can I test my vehicle if it has a check engine light on?

No. The station will refuse to test if the check engine light is illuminated, because the light indicates an emissions-related fault. You must have the fault diagnosed and repaired, and the light must be off, before you can test. This usually requires a trip to a repair shop with a diagnostic scanner.

What if I move out of Loveland before my registration expires?

If you move to an area that does not require emissions testing, you can renew your registration without a test. If you move to another area in Colorado that does require testing, you will need a test from a station in your new county. Contact the health department in your new county to find certified stations.

How long does a passing result stay valid?

A passing result is valid for your entire registration year. Once it is on file, you can renew your registration any time before your expiration date. You do not need to retest during that year unless your registration expires and you renew again.

Can I test a vehicle I just bought if it is not yet registered in my name?

Most stations require proof of ownership or a bill of sale. Call the station first to confirm what documents they accept. You may be able to test under the previous owner's registration temporarily, but you will need to transfer the registration to your name before you can renew it.

What happens if I let my registration expire without passing the emissions test?

Driving with an expired registration is illegal and can result in a traffic stop, fine, and impound in some cases. If your registration has already expired, renew it when ready by going to a DMV office in person with proof of a passing emissions test or a waiver letter.