Reduced engine power Message after Fuel fill-up

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moreira72

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I purchased a 2004 Navigator a few months ago and it has been running great. I recently fueled up and the attendant filled with 87 regular instead of 93 super. The Navigator Requires Premium. Now I have a Reduced engine Power message at highway speeds going uphill. I haven't burned through that fuel yet. Still have about 1/4 tank of the 87 octane left. Is the message due to the lower octane fuel? TIA
 
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docraymund

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Its not the fuel you need to check throttle body and accelerator pedal sensors for malfunction. You need a repair manual for this.
 
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