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Car Smog Test

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Symptoms of a Bad or Failing EGR Temperature Sensor
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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...
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Symptoms of a Bad or Failing EVP Position Sensor
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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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Symptoms of a Bad or Failing EGR Pressure Feedback Sensor
Common signs include engine performance issues like rough idle and decrease in power, failing an emissions test, and the Check Engine Light coming on.
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
Code P1320
The ignition system fault generally points to ignition coil concerns. They are a common failure item and all must be replaced at the same time along with the spark plugs. In the process, the valve cover gaskets can be inspected...
Question
Car won't pass smog.
Hello! I will be happy to assist you. On your particular vehicle, random misfires are commonly caused by things such as low fuel pressure, a faulty oxygen sensor, bad vacuum lines, or faulty air flow sensors; a broken or loose...
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
did not pass smog test. obd catalyst, oxy snsr heat not complete.
Hi there. If your Check Engine Light is not illuminated, there is not a fault with the system. Before a vehicle can pass emissions testing, certain readiness monitors must be completed. One of which is the heater O2 monitor. The...
Question
smog test incomplete.
If your Check Engine Light is not illuminated, there is not a fault with the system. Before a vehicle can pass emissions testing, certain readiness monitors must be completed. One of which is the heater O2 monitor. The vehicle will...
Question
Can't pass smog check due to misfire
If your engine is misfiring it will not pass a smog check. The engine needs to be in good running condition in order to pass. I suggest having an expert mechanic, such as one from YourMechanic, inspect why your engine...
Question
My EVAP canister has a small leak
Hello! I suggest that a technician with a smoke machine test your EVAP system. The smoke will come out of any area of the EVAP system that is leaking. Most Auto shops will have a smoke machine. I would recommend...
Question
Can't pass smog check
When you take your vehicle to get a smog check, the smog technician will place your Volvo through a series of tests to determine if your vehicle is polluting the environment. If your Volvo did not pass smog, they will...
Question
Truck failed emissions test
If you want your Ford Ranger to pass its emissions test, diagnosing those five codes will be your start to correcting any problems that are currently preventing your Ranger from passing the test. Due to the information provided being a...
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
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...

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