Just got these symptoms. I'm having trouble finding any posts that clarify based
on the particular codes I'm seeing in combination:

B2127: accelerator position (though I've also seen parking brake sensor mentioned)
U1000: CAN communication line signal malfunction
C1130: Engine signal 1
C1109: Ground and power system

Some of what I've read points to the ABS actuator, and some to throttle bodies. I think
camshaft or crank position sensor would throw additional codes? Assistance greatly
appreciated! This is an '07 G35S 6MT.

Oh - and it may be just a coincidence, but yesterday I poured a bottle of Techron in
the tank.

 

Update: After sitting overnight the problem resolved. I cleared all the codes. Hopefully
just a fluke.

 

C1130 - TCS/VDC/ABS computer not receiving signal from one of the major engine systems.

C1109 - TCS/VDC/ABS computer battery voltage low

U1000 - CANBUS code that one of the computers is not communicating properly (likely the TCS/VDC/ABS since it's throwing other codes)

B2127, are you sure it wasn't P2127 which is the APP accelerator pedal position switch (gas pedal switch), when this fails it will cause that C1130 on the TCS/ABS/VDC computer.

Have you been having battery issues and is the car starting sluggishly? I have a strong feeling that you need to clean up your battery terminals and lugs.

The bottle of fuel system cleaner was pure coincidence.

 

Thank you! I think some of those codes were actually old. Battery terminals were probably cleaned up
since. I've cleared everything now, so we'll see what happens next....