07 Yukon check engine coming on and off

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Upnorthdownsouth

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My check engine light is coming on and off dealer said it was an acceleration sensor code but everything hiked out fine. It will be on for maybe a day, then go off for a week or so, seemingly at random times, when u start it it willbe on suddenly, or you will be parked and running and will just turn on. What could be causing this? Sensor malfunctioning even though dealer said was ok? Any suggestions, stories, anything to help me figure this out would be greatly appreciated. Thanks guys.
 

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