Skip the auto shop - Our mechanics make house calls

Q: Need to pass smog check

asked by on

I had bought a 04 KIA about a month ago, needed to register it so I took it to get a smog check and it failed, saying it was catalyst system. I'm wondering how to fix this. I've since driven it a lot of miles, the check engine hasn't come on once, it doesn't overheat, or misfire at all... The gas milage is good or it seems to be. It started making a ping noise but it was the oil, which the computer also didn't give a signal of check oil. It doesn't seem to be burning oil, I'm not sure what to do. Please help

My car has 128000 miles.
My car has a manual transmission.

A: Hi, thanks for writing in. This is likely a...

Hi, thanks for writing in. This is likely an issue related to the catalytic converter which may be the converter itself or the O2 sensor which is a sensor that monitors the productivity of the converter as it converts toxic exhaust gases into less harmful pollutants prior to expelling them out of the exhaust into the atmosphere. When either of these are not functioning properly, this will cause the car to fail the emissions or smog test.

Here at YourMechanic, we can have a technician come to your home or office to inspect and diagnose this issue for you, and make or suggest the necessary repairs so you can pass your smog check!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: brake light issues

Hello. If the high mount light is working, I would trace the circuit from the other brake light bulbs to identify an open in the circuit or an excessive voltage drop. If the voltage drop along the circuit exceeds tenths...

Q: after replacing wheel bearing discs and brake pads brake lights won't work

Hi there. I don't believe the repair is related to the brake lights not working; could simply be a coincidence. First, check all the brake lights to make sure the bulbs are not burned out and replace as necessary. Believe...

Q: Car is reading trouble code PO136 01/01

Hi. There could be a couple of things going on here. There are multiple oxygen sensors on your car and sometimes what we think bank 1 is may not be and the wrong oxygen sensor is replaced giving us the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...