Silicon Valley Auto Repair


Why Isn't My Car Passing Smog Testing?

In our great state of California, vehicle owners are required to have smog testing performed on all standard gas vehicles every two years with the exception of owners of vehicles eight or less model years old. If you own a vehicle that is less than eight model years old, you will pay an annual smog abatement fee for the first eight registration years instead of being required to provide a biennial smog certification.

If your vehicle is due for registration renewal and a smog test, it will be indicated on your registration renewal notice. A smog test is essential a test to determine whether or not your vehicle meets state standards for emissions. We want to ensure that our vehicles are not emitted excessive amounts of pollutants to protect our environment. 

If you do need a smog test in bay area ca, you can count on Quality Tune-Up Auto Care. If you happen to fail your smog test, there are a number of reasons why this can happen. A failed smog test can stem from an issue within the exhaust or emissions system. One of the most common reasons is a faulty catalytic converter. However, a bad oxygen sensor can also be the culprit. 

Reasons for smog test failure include: 

  • Failing or damaged catalytic converter
  • Bad oxygen sensor
  • Faulty fuel injectors
  • Worn spark plugs
  • Loose gas cap
  • Dirty air filter
  • Check engine light is on
  • Past due for your regular oil change

Here at our shop, we can perform both your vehicle's smog test and in the instance that your vehicle fails, we can figure out the cause of the failure and what repairs are necessary to get your vehicle to pass. 

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