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・Save up to 30%

Get a quote

What others are asking

Q: Car shuts off while driving

This sounds like potentially a mass air flow sensor problem. The mass air flow sensor monitors the air flow into the engine and when this is faulty can cause reactions much like what you are describing. I would suggest having...

Q: Engine runs at 4000 rpms shuts off get a P2074 code

There is a technical service bulletin 18-007-08 that covers this code and calls for a reprogram of the PCM to fix the issue. You should have the reprogramming done first before replacing any parts for this code. The P2074 code...

Q: O2 Sensors

As you may know the oxygen sensors, which are part of your emissions system, read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed...

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...