Manufacturer Specific U Codes for GM List of Manufacturer Specific U Codes for GM. U2000 Invalid BFC Transmitted SPI Data U2001 Invalid IPC Transmitted SPI Data U2002 SPI Data-In Low U2003 SPI Data-In High U2004 SPI Data-Out Low U2005 SPI Data-Out High U2006 SPI Clock-Out Low U2007 SPI Clock-Out High U2050 SIR PPS/CPS Communications Link malfunction U2100 CAN Bus OFF U2100 CAN-BUS Communication Malfunction U2102 More Controllers on Bus than Programmed U2103 Fewer Controllers On Bus Than Programmed U2104 CAN Bus Reset Counter Overrun U2105 CAN Bus Error ECM U2105 … Read More
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