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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.

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.

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