No experience.I am getting the u0109 engine code. I didn’t mess with any fuses. I took it to the dealer didn’t see anything wrong cleared it came back today. Has anyone had experience with this code ?
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Here's a link to some info about the code and what it might mean.
U0109 Lost Communication with Fuel Pump Control Module (FPCM)
Generally if the engine is not manifesting any untoward behavior and if the CEL is not flashing the SOP is to clear the code and see if it comes back.
There is a lot of CAN bus message traffic -- I have a tool that can capture this and it can get/capture hundreds of messages per second. At 500,000 bits per second that's approx. 50,000 bytes per second and at IIRC 8 bytes per CAN message that's around 6250 message per second. Allowing for some time between the messages can still have hundreds of message flying by per second.
So one "lost" or "dropped" message may not be that big of a deal.