Skip the auto shop - Our mechanics make house calls

Q: why wont my car pass smog

asked by on

put in new distributor, new plugs, cleaner in the the gas

My car has 186000 miles.
My car has an automatic transmission.

A: There are many components that work togethe...

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 pass the smog test, it is likely that your Check Engine Light is on, indicating a diagnostic trouble code that is stored. A certified technician, like one from YourMechanic, will be able to scan your vehicle and look at the data to determine the exact cause of your concern.

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: How does a smog test work?

How a smog test works depends on where you live. If you live in the United States different states have different requirements and some parts of states may have as well. Usually the more densely populated areas require more stringent...

Q: Emissions test failed with a new gas cap

Hey there. This may be related to other possible malfunctions in your EVAP system, such as a faulty vent valve solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects...

Q: I have a 2001 honda cr-v se 2 Li I4 engine. on the back of the throttle body is a im guessing it's some type of sensor,two mires p

You are correct. This is the throttle position sensor or TPS. You should not need any special tools to remove it. Most throttle position sensors are mounted to the throttle body with 7mm, 8mm, or tor bolts. If you have...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...