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Your question makes no sense at all, so I will assume you are asking about the Check Engine Light as that is the category you posted the question in. The check engine light is on because the ECU has detected a problem with the emissions system. Have the ECU scanned with an OBD2 scan tool which will retrieve the code that has been set. This code will tell you what part of the emissions system is being effected.

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13y ago

What else can I help you with?