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Car Smog Test

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Symptoms of a Bad or Failing EGR Temperature Sensor
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Symptoms of a Bad or Failing Exhaust Clamp
If your exhaust is noisy, loose, or failing an emissions test, you may need to replace an exhaust clamp.
How Is My Car Tested For Emissions?
Emissions testing is quickly becoming the norm across the US as more and more states and counties realize the need to control and monitor emissions and air quality. However, the process for testing emissions can be confusing (and...
Symptoms of a Bad or Failing Exhaust Air Supply Tube
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Symptoms of a Bad or Failing EVP Position Sensor
Common signs include poor cold start performance, the Check Engine Light coming on, and failing an emissions test.
How to Get a Smog Check
Smog checks are designed to help lower the emissions created by vehicles. The word “smog” refers to smoke and fog air pollution, which is created in large...
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Vehicle Emissions & Air Pollution
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How to Pass an Emissions Test
Nobody wants to fail an emissions or smog test: it means you have to figure out what caused the failure and get it fixed. Then you have to return for...
Should I Get a Smog Technician License?
Getting your smog technician license can help you gain more experience as a mechanic, while also earning some extra cash.
How to Get Smog Technician Certified in Arizona
Automotive technician jobs include smog certified emissions inspectors. In Arizona, you need to work at an emissions testing station.
How to Get Smog Technician Certified in Colorado
Automotive technician jobs include smog certified emissions inspectors. In Colorado, you need to work at an emissions testing station.
How to Get Smog Technician Certified in California
Automotive technician jobs include smog certified emissions inspectors. In California, you need to work at an emissions testing station.
How to Get Smog Technician Certified in Washington
Automotive technician jobs include smog certified emissions inspectors. In Washington, you need to work at an authorized testing station.
How to Get Smog Technician Certified in Virginia
Automotive technician jobs include smog certified emissions inspectors. In Virginia, you need to work at a certified repair facility.
How to Get Smog Technician Certified in Vermont
Automotive technician jobs include smog certified emissions inspectors. In Vermont, you need to work at a testing facility.
How to Get Smog Technician Certified in Connecticut
Automotive technician jobs include smog certified emissions inspectors. In Connecticut, you need to work at an emissions testing station.
How to Get Smog Technician Certified in North Carolina
Automotive technician jobs include smog certified emissions inspectors. In North Carolina, you need to work at a licensed inspection station.

Related questions

Question
Failed smog test
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...
Question
Car won't pass smog due to computer code P0420 - 2006 Volkswagen Rabbit
This code is related to the catalytic converter. As you may know, the catalytic converter is a section of your exhaust system that helps to complete the combustion process when excess unburnt fuel gases pass through the exhaust. Due to...
Question
why wont my car pass smog
There are many components that work together to ensure your vehicle produces low emissions. It can be something as simple as a vacuum leak or faulty PCV valve, or even a faulty oxygen sensor or catalytic converter. If you didn't...
Question
Check engine light is on - 2011 Nissan Altima
Hello there, thank you for asking about your 2011 Nissan Altima. It's hard to say exactly what the shop you spoke with quoted you for, or where they were getting their parts and labor estimates from. Usually the parts are...
Question
Smog fail - 1998 Chrysler Sebring
Hi there. I have extensive experience with emissions. The data you have given is very difficult to discern. Being a 1998, I am surprised it is being load mode tested. Typically it's a OBD check. Assuming the Check Engine Light...
Question
Need to pass smog check
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...
Question
Took for smog test and fail said that it was supposed to be 430 but was 469. What do I do to fix it?
Generally, when the car fails a smog test, the smog shop will give you a print out and tell you what specifically caused the failure. Some common causes for failing these tests are faulty O2 sensors, bad catalytic converters, vacuum...
Question
Car won't pass smog.
The path to pass emissions will depend on what part of the emissions test (carbon monoxide (CO), oxides of nitrogen (NOx) or hydrocarbon (HC) levels) were out of tolerance. There are different components, and tuning/repair activities required to address each....
Question
Can a bad muffler cause a smog test to fail?
Hello. You need to see why the last smog failure was for. If the failure was excessive O2 in the exhaust test, then it could be the muffler. If it is for high HC or CO then it may be...
Question
How do i fix the timing on my car?
There are several ways to check and set the ignition timing. The most traditional method is to check timing with a timing light against the recommendations of Nissan for your 1990 240SX. However, there could be issues with timing due...
Question
P0010 -"A" Camshift Position Actuator Circuit/Open Bank 1 & OBD Bulb check failed on smog test - How to search for mechanic?
Hi there. The P0010 code is coming on for the VVT-I (variable valve timing with intelligence) system is malfunctioning. Changing the engine oil and filter could solve this issue and fix most of the problems. But if changing the engine...
Question
Oil Change and Smog Test
Hello! Your oil change appointment should not impact your car's ability to pass a smog test immediately after having the oil changed as the oil change has nothing to do with your car's emissions system or functionality.
Question
Failed the emission test. I'm suspecting a bad oxygen sensor.
Hi there. Change out the spark plug wires, put sea foam in the vacuum system to clean the internals of the engine and change the oil and filter. Then drive the vehicle around and fuel up with Techron fuel. When...
Question
Failed smog test. OBD-II monitors not ready. Needs to be reset
Hello. If your monitors are showing not ready, then that is because the computer was recently reset or the battery may have been replaced. If either of these occurred, then there is a specific amount of driving that needs to...
Question
Things to do when getting smog test at Star station
Hi there. The smog test for vehicles of 1996 and newer will pass if the engine light is off and the gas cap passes the sealed test. As long as the gas cap is sealing to the fuel inlet tube...
Question
Reasons Why a 2003 Nissan Murano Can't pass a smog?
The protocol used in emission testing varies by state but typically the test station will rely on the vehicle's own reported OBD-II status. If all OBD-II I/M monitors read ready when the test station retrieves data from your vehicle computer...
Question
2009 chrysler 300c timing chain recall, does this reset the computer? (I need smog test soon after)
Yes this would reset the computer monitors for your smog test to pass. You should drive the vehicle for at least a week or more driving in all types of situations. Have a mechanic scan the computer to see if...
Question
Smog check failed due to Oxygen sensor
Hello, thank you for writing in. The first person to tell you this was correct to a certain extent. If the system is not warmed up, the readings cannot be taken accurately. However, if the engine is warmed up and...
Question
2006 Ford Mustang has check engine light on
There are countless potential causes for your illuminated check engine light. The mechanic manually turned off the light, but it came back on because the problem has not been fixed. The first place to start is retrieval of the stored...
Question
How do I get the monitors on my car ready for SMOG test?
Hi there. Take a scanner and check the computer (ECM) for any codes that could be pending. Check to see what the codes are and correct the code by performing the repair on the area that is not working or...

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