Q: Q: Failed smog test

asked by on

The reason my minivan didn't pass the smog test, they tell me, is because the catalytic converter log isn't filled. They told me to drive it on the interstate for an hour between 55-60mph. I did this several times, but still didn't pass the smog test. What do you suggest that I do to solve this problem?

Hello. The catalytic converter acts as a filter for exhaust gasses emitted from the vehicle. This purpose of this is to reduce the pollutants that are expelled into the environment. The first thing you could try is adding a catalytic converter cleaner to your gas. You’ll want to allow this to run through the catalytic converter and see if it passes the smog test. You could also try using a higher grade of gas and this might help your vehicle pass the smog test. If this doesn’t work, it may be necessary to replace the catalytic converter itself. If you are unable to pass the smog test and need to replace the catalytic converter contact a certified technician, such as one from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Failed smog test

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car won’t start. There is a red flashing light, car with key symbol. No noise is made when I turn key. Just had it checked

You should not have two programmed keys on the same keychain. If that does not work then you have a problem with the anti-theft system or the key programming. The system can only be programmed using the factory level scanner....

Q: Do I have a damaged head gasket?

Hi there. This can be a bad head gasket or it may be something much smaller. If the coolant temperature gauge is staying in the normal range then it may just have a leak in the system. If there is...

Q: Why Is it so Important That a Car Passes Emissions Testing?

Emissions testing provides several very useful functions for our daily lives. The combustion gases that come out of the tailpipes of our vehicles are comprised of carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx), carbon dioxide (CO2), and oxygen...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.