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False Turbo Underboost code being set

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False Turbo Underboost code being set

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Old 07-06-2018, 10:58 AM
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Join Date: Sep 2011
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Question False Turbo Underboost code being set

2013 F-150 3.5 Ecoboost. When towing in upper elevations, after driving for several hours and then stopping for gas engine throws a Turbo Underboost Code when reentering the highway. No loss of power is ever encountered. Resetting the code at lower elevation, it doesn't reoccur... until the next time I tow at elevation. Using premium gas makes no difference except for better gas mileage.
 
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