Will a Car Pass Smog with Check Engine Light On?
The answer to this question depends on a few factors, including the state in which you live, the type of smog test that is being performed, and the reason why the check engine light is on.
State Regulations
In most states, a car will not pass a smog test if the check engine light is on. However, there are some states that do not have this requirement. For example, in California, a car can still pass a smog test if the check engine light is on, but the car must be repaired within 60 days.
Type of Smog Test
There are two types of smog tests: a tailpipe test and an evaporative emissions test. A tailpipe test measures the emissions that are coming out of the exhaust pipe, while an evaporative emissions test measures the emissions that are coming from the fuel system.
If your car is undergoing a tailpipe test, the check engine light will likely cause the car to fail the test. However, if your car is undergoing an evaporative emissions test, the check engine light may not affect the results of the test.
Reason for Check Engine Light
The reason why the check engine light is on will also affect whether or not the car will pass a smog test. Some reasons for a check engine light are more serious than others, and some reasons will cause the car to fail a smog test while others will not.
For example, if the check engine light is on because of a problem with the emissions system, the car will likely fail a smog test. However, if the check engine light is on because of a problem with a non-emissions related system, such as the air conditioning system, the car may still pass a smog test.
Conclusion
Whether or not a car will pass a smog test with the check engine light on depends on a few factors, including the state in which you live, the type of smog test that is being performed, and the reason why the check engine light is on. If you are unsure whether or not your car will pass a smog test with the check engine light on, you should contact your local emissions testing station.
