Typically, it would be the oxygen sensor, but you should go to an auto parts store (such as autozone, advance auto, western auto) and they will use a OBD2 handheld scanner to find out why the light is on. This is typically a free service. The " check engine light" is by far one of the most misunderstood technological advances It is a warning light that is illuminated when there is a problem affecting the EMISSIONS of the vehicle.. Don't let it bother you as it is a good thing once you understand it. One point that was brought up a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say a small percentage of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have multiple computers aside from the powertain computer) will run a series of self-tests. They will only run under certain criteria. And they are different from manufacturer to manufacturer. Some self-tests or
Check the engine coolant... Is it full? yes coolant level is full
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
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check out lugnutpatterns.com
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
pontiac g6 check engine light car with wrench
is the computer setting a code or check engine light, if not it could be your crank sensor.
It might cause the "check engine" light to come on.
Try disconnecting battery for about 10 mins. or have vehicle scanned and codes cleared
Check on the engine block or intake manifold of your motor. Most engines are cast with that information right on it.
after the cause of the code is repaired, you reset with a scan tool, or by unhooking the battery.