Skip the auto shop - Our mechanics make house calls

Q: Car failing smog check

asked by on

My car is failing the smog test with the code OBDII Monitors Not Ready - Oxygen Sensor.

A: Hi there. If your car is not passing smog d...

Hi there. If your car is not passing smog due to the monitors not being ready, that means the vehicle needs to be driven until the monitors are completed. The OBDII monitors are a self performed test that the vehicle's computer will carry out automatically when the correct driving conditions, such as speed, temperature, etc,. have been met. As most vehicle's will not pass smog until all of the monitors are completed, I would recommend driving the vehicle normally for a few more days, and then having a professional technician, such as one from YourMechanic, rescan the computer to see if the monitors have been completed.

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・Save up to 30%

Get a quote

What others are asking

Q: Car cranks but won't turn over

Hello. This problem could be caused by several different things. You could be out of gas, the fuel pump might be working properly, the timing belt could be broken, there could be an issue with electricity getting to your spark...

Q: Vehicle overheated poor ac cooling and gas mileage

Hi there: Changing the radiator, hoses and thermostat does not typically negatively impact fuel economy or AC issues. However, the installation of those items might, especially if the serpentine belt was installed incorrectly. However, with Hybrid models, the two issues...

Q: AC not working

The air conditioning system is complex as there are many parts working together. The most common issue with the system are leaks. If not repaired correctly, the system will degrade from the inside. Air or moisture in the system will...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...