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Answered 2016-08-16 20:13:00

The check engine light means that there is a posssible problem with the engine . There is not one specifc problem that it could be. The dealership can look at the chip and figure out the specific problem and get you going in the right direction. Apparently, if the light comes on intermittendly, immediate check-up is required, when it stays on solid, the diagnosis can be delayed for a little while. Often on 1995 and older models of the Chevy Cavalier, the "Check Engine Light" will be due to a problem with your Emissions. The wisest thing to do is take it to your local chevy dealer and have them service your engine for a small fee. My check engine light has been on for two and a half years and my car shifts hard. I went to a dealer and they told me it was my speed sensor saying there is a slip in the trany that wasnt there so it Was putting to much pressure in my trany lines cause the car to shift hard my ets off light is also on they tried to tell me it was the motor mounts. Danielle-Owner of a 98 chevy cavalier Z24. 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

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