No Custom Tune

At this time Flex Fuel is not supported on any of our OTS maps.  As such if you have the kit installed without an appropriate map you will likely have a code for either the rear oxygen sensor or the TGV valve.  It is not recommended to drive with the flex fuel kit installed and no custom map.  Additionally it will not be making any alterations to the tune based on ethanol content, so it is not safe to add any E85.  You will need to get in touch with a licensed Protuner or, if you have the knowledge and skill required, tune the vehicle yourself using COBB's Accesstuner software.

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