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Does the check engine light remain on until you reset it? Or will it go off when it no longer detects any more errors. I'm asking because recently my light came on with code 1490 (Radiator Low Fan Open/Short Circuit), but I'm not sure if it means that right now at this moment my fan circuit is messed up or that sometime in the past the fan circuit was open/shorted. Driving a 99 Intrepid 3.2L ES.
 

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Depending on the system involved, usually after a few restarts after the problem no longer exists, the CEL will go out. I have noted that after 4 warm restarts, by CEL will go out. From time to time, I get a code P0406 for my EGR sensor. It always goes out after 4 warm restarts.
 
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