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Why is my check light on the 1997 Nissan Altima?

Vehicle: 1997 Nissan Altima

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The check engine light is on because one of the monitored systems of the car has a problem.There are over 500 reasons for the light to come on. Since there are so many reasons, a code reader is required to determine which code is in the system. This is the best way to determine why the light is on.

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