My car has the following codes
u019B <- HS CAN communication lost between BECM and SOBDM while battery was charging, could be a connector.
U0100 <- HS CAN communication lost between BECM and PCM, vehicle will not start, could be a connector.
U0111 <- HS CAN communication lost between BECM and GFM2, could be a connector.
U3003 <- BECM detects voltage either less than 8.5 or greater than 16 Check fuse 11 in the rear junction box.
Do we see a trend here?
If I was fixing the car, I would first check the connectors on the BECM (upper battery pack) particularly C4805E (The big connector under the battery cover)
Connector C4805E pins of interest
Pin 7,20 - CAN BUS HS HIGH
Pin 9 - CTRL MOD- WAKE UP PCM FROM BECM
Pin 12,16 - CAN BUS HS LOW
Pin 14 - 12V POWER SUPPLY OUTPUT
Pin 15,19 - FUSE 11 or CIRCUIT BREAKER
Pin 22 - TEMPERATURE OUTPUT SIGNAL
Pin 23- TEMPERATURE INPUT SIGNAL
Pin 26- TEMPERATURE INPUT SIGNAL RETURN
Pin 33- TEMPERATURE OUTPUT SIGNAL RETURN