Will a Car Pass Emissions with Check Engine Light On?
The answer is: no.
A check engine light is a warning that there is something wrong with your car’s emissions system. When the check engine light is on, it means that your car is not running as efficiently as it should be, and it is likely emitting more pollutants than normal.
In most states, it is illegal to drive a car with a check engine light on. This is because cars with check engine lights on are more likely to fail emissions tests.
What to Do If Your Check Engine Light Is On
If your check engine light is on, you should take your car to a mechanic as soon as possible. The mechanic will be able to diagnose the problem and make repairs.
In the meantime, you should avoid driving your car if possible. If you must drive your car, be sure to keep the windows open to ventilate the cabin.
What Causes a Check Engine Light to Come On?
There are many different things that can cause a check engine light to come on. Some of the most common causes include:
- Loose or damaged gas cap
- Faulty oxygen sensor
- Catalytic converter failure
- Evaporative emissions system leak
- Mass airflow sensor failure
How to Prevent a Check Engine Light from Coming On
There are a few things you can do to help prevent a check engine light from coming on. These include:
- Keep your car’s engine tuned up
- Replace your car’s oxygen sensor every 50,000 miles
- Replace your car’s catalytic converter every 100,000 miles
- Tighten your car’s gas cap securely
- Avoid driving your car in stop-and-go traffic
Conclusion
If you see a check engine light on your dashboard, don’t ignore it. Take your car to a mechanic as soon as possible to have the problem diagnosed and repaired.
Driving with a check engine light on can lead to serious problems, including failed emissions tests, fines, and even engine damage.
