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: Mazda not starting.

If your engine is cranking over at a normal speed but not starting, your battery would likely not be the cause of the no start condition. If your car is not cranking at all, then yes, a battery with low...

Q: Can you reset or bypass traction control?

If you just put on new tires only in the rear and not in the front then the tires need to be checked to see if there is a difference in the tire height. This will cause the wheel sensors...

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

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.