Can I Pass Smog With Check Engine Light On??

During your drive, maybe even as soon as you start the engine, your vehicle realizes an emissions fault, and turns on the Check Engine or Service Engine Soon light.

No check engine light, but no chance of passing the emissions test either.

However, you will not know this until your vehicle is smog tested.

What helps pass a smog test?

Here are the top tips from our experts to prepare your car for a smog check:

  • Clear that “Check Engine” light.
  • Drive the car at highway speeds for the two weeks prior to the smog test.
  • Change the oil, but only if it needs it.
  • Do a tune-up two weeks before the smog test.
  • 5. Make sure the tires are properly inflated.

What happens if you fail a smog check?

If your vehicles smog check doesn’t pass, you have two choices: repairing the faulty components or stop driving your car. Your DMV registration can’t be renewed if your smog check fails. Now, your failed smog test might cost you in repairs.

What is checked in CA smog test?

Specific Test Order: The State of California requires smog stations to test vehicles in the specific order listed above. The first inspection (emissions inspection) is performed by the exhaust gas analyzer “smog machine”.

Photo in the article by “Wikipedia”