Low MPG after oil and filter change?

grporter

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First Name
Galen
Joined
Sep 17, 2018
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Location
Sacramento, CA
Vehicle(s)
2016 ABM sedan LX CVT, 2014 OBP Accord Hybrid Touring, 2010 Dodge Ram 2500 CCSB cummins
Is it possible the dealer plugs in to the OBD to check for codes or updates and resets it? Maybe a reset of emissions monitors or other parameters puts the car into an initial learning mode. I'm new to this 16 Civic, but I've been modding and tuning cars and trucks for awhile (yes, I'm THAT old).
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