Chevrolet · GMC · Holden · Buick — fault codes starting with U1

Fault codes

550

Block

U1

Make group

Chevrolet · GMC · Holden · Buick

Source language

English

The 550 Chevrolet · GMC · Holden · Buick fault codes that start with U1, with descriptions.

U10

Code	Description
U1000	Communication Lost with Engine Control Module
U1001	Communication Lost with Powertrain Multiple Control System
U1002	Loss of serial communications for class 2 devices
U1003	Loss of serial communications for class 2 devices
U1004	Loss of serial communications for class 2 devices
U1005	Loss of serial communications for class 2 devices
U1006	Loss of serial communications for class 2 devices
U1007	Loss of serial communications for class 2 devices
U1008	Loss of serial communications for class 2 devices
U1009	Loss of serial communications for class 2 devices
U100B	Gear Shift Control Module Powertrain Sensor Bus Enable
U1010	Loss of serial communications for class 2 devices
U1011	Loss of serial communications for class 2 devices
U1012	Loss of serial communications for class 2 devices
U1013	Loss of serial communications for class 2 devices
U1014	Loss of serial communications for class 2 devices
U1015	Loss of serial communications for class 2 devices
U1016	Loss of Communications with PCM
U1017	Loss of serial communications for class 2 devices
U1018	Loss of serial communications for class 2 devices
U1019	Loss of serial communications for class 2 devices
U101B	Communication Lost with Fuel Rail Pressure Sensor 2
U101C	Communication Lost with Fuel Rail Pressure Sensor Bank 2 Sensor 2
U101D	Communication Lost with Intake Manifold Tuning Valve Position Sensor
U1020	Loss of serial communications for class 2 devices
U1021	Loss of serial communications for class 2 devices
U1022	Loss of serial communications for class 2 devices
U1023	Loss of serial communications for class 2 devices
U1024	Loss of serial communications for class 2 devices
U1025	Loss of serial communications for class 2 devices
U1026	Loss of ATC Class 2 Communication
U1027	Loss of serial communications for class 2 devices
U1028	Loss of serial communications for class 2 devices
U1029	Loss of serial communications for class 2 devices
U1030	Loss of serial communications for class 2 devices
U1031	Loss of serial communications for class 2 devices
U1032	Loss of serial communications for class 2 devices
U1033	Loss of serial communications for class 2 devices
U1034	Loss of serial communications for class 2 devices
U1035	Loss of serial communications for class 2 devices
U1036	Loss of serial communications for class 2 devices
U1037	Loss of serial communications for class 2 devices
U1038	Loss of Serial Communications for Class 2 Devices
U1039	Loss of Serial Communications for Class 2 Devices
U1040	Loss of Class 2 Communications with ABS
U1041	Communication Lost with Brake/Traction Control System
U1042	Lost Communications with Brake/Traction Control System
U1043	Loss of Serial Communications for Class 2 Devices
U1044	Loss of Serial Communications for Class 2 Devices
U1045	Loss of Serial Communications for Class 2 Devices
U1046	Loss of Serial Communications for Class 2 Devices
U1047	Loss of Serial Communications for Class 2 Devices
U1048	Loss of Serial Communications for Class 2 Devices
U1049	Loss of Serial Communications for Class 2 Devices
U1050	Loss of Serial Communications for Class 2 Devices
U1051	Loss of Serial Communications for Class 2 Devices
U1052	Loss of Serial Communications for Class 2 Devices
U1053	Loss of Serial Communications for Class 2 Devices
U1054	Loss of Serial Communications for Class 2 Devices
U1055	Loss of Serial Communications for Class 2 Devices
U1056	Loss of Communications with RSS
U1057	Loss of Serial Communications for Class 2 Devices
U1058	Loss of Serial Communications for Class 2 Devices
U1059	Loss of Serial Communications for Class 2 Devices
U1060	Loss of Serial Communications for Class 2 Devices
U1061	Lost communications with Suspension Control System
U1062	Loss of Serial Communications for Class 2 Devices
U1063	Lost communications with Suspension Control System
U1064	Loss of Communications with DIM
U1065	Loss of Communications with IPM
U1066	Loss of Communications with RIM
U1067	Loss of Serial Communications for Class 2 Devices
U1068	Loss of Serial Communications for Class 2 Devices
U1069	Loss of Serial Communications for Class 2 Devices
U1070	Lost communications with Body Multiple Control System
U1071	Loss of Serial Communications for Class 2 Devices
U1072	Loss of Serial Communications for Class 2 Devices
U1073	Communication Lost with Body Multiple Control System
U1074	Loss of Serial Communications for Class 2 Devices
U1075	Loss of Serial Communications for Class 2 Devices
U1076	Loss of Serial Communications for Class 2 Devices
U1077	Loss of Serial Communications for Class 2 Devices
U1078	Loss of Serial Communications for Class 2 Devices
U1079	Loss of Serial Communications for Class 2 Devices
U1080	Loss of Serial Communications for Class 2 Devices
U1081	Loss of Serial Communications for Class 2 Devices
U1082	Loss of Serial Communications for Class 2 Devices
U1083	Loss of Serial Communications for Class 2 Devices
U1084	Loss of Serial Communications for Class 2 Devices
U1085	Loss of Serial Communications for Class 2 Devices
U1086	Loss of Serial Communications for Class 2 Devices
U1087	Loss of Serial Communications for Class 2 Devices
U1088	Loss of Communications with SDM
U1089	Loss of Serial Communications for Class 2 Devices
U1090	Loss of Serial Communications for Class 2 Devices
U1091	Loss of Serial Communications for Class 2 Devices
U1092	Loss of Serial Communications for Class 2 Devices
U1093	Loss of Serial Communications for Class 2 Devices
U1094	Loss of Serial Communications for Class 2 Devices
U1095	Loss of Serial Communications for Class 2 Devices
U1096	Loss of Communications with IPC
U1097	Loss of Serial Communications for Class 2 Devices
U1098	Loss of Serial Communications for Class 2 Devices
U1099	Loss of Serial Communications for Class 2 Devices

U11

Code	Description
U1100	Communication Lost with Vehicle Performance Data Recorder
U1101	Communication Lost with Driver Information and Displays Control System
U1102	Loss of Serial Communications for Class 2 Devices
U1103	Loss of Serial Communications for Class 2 Devices
U1104	Loss of Serial Communications for Class 2 Devices
U1105	Loss of Serial Communications for Class 2 Devices
U1106	Loss of Serial Communications for Class 2 Devices
U1107	Loss of Serial Communications for Class 2 Devices
U1108	Loss of Serial Communications for Class 2 Devices
U1109	Loss of Serial Communications for Class 2 Devices
U110A	Communication Lost with Humidity Sensor - Air Temperature Sensor
U110B	Communication Lost with Ft Deterrent Module
U110D	Communication Lost with Ambient Color Lamp 1
U110E	Communication Lost with Ambient Color Lamp 2
U110F	Communication Lost with Ambient Color Lamp 3
U1110	Loss of Serial Communications for Class 2 Devices
U1111	Loss of Serial Communications for Class 2 Devices
U1112	Loss of Serial Communications for Class 2 Devices
U1113	Loss of Serial Communications for Class 2 Devices
U1114	Loss of Serial Communications for Class 2 Devices
U1115	Loss of Serial Communications for Class 2 Devices
U1116	Loss of Serial Communications for Class 2 Devices
U1117	Loss of Serial Communications for Class 2 Devices
U1118	Communication Lost with Lighting Control System
U1119	Loss of Serial Communications for Class 2 Devices
U111B	Communication Lost with Air Heater
U111E	Communication Lost with EVAP Purge Pump
U111F	Communication Lost with Card Reader Receptacle
U1120	Loss of Serial Communications for Class 2 Devices
U1121	Communication Lost with Roof Console
U1122	Loss of Serial Communications for Class 2 Devices
U1123	Loss of serial communications for class 2 devices
U1124	Loss of serial communications for class 2 devices
U1125	Loss of serial communications for class 2 devices
U1126	Loss of serial communications for class 2 devices
U1127	Loss of serial communications for class 2 devices
U1128	Loss of Communications with IRC
U1129	Loss of Communications with AMP
U112A	Communication Lost with Auxiliary Engine Coolant Fan 1
U112B	Communication Lost with Auxiliary Engine Coolant Fan 2
U112D	Communication Lost with Trailer Tire Pressure Indicator Module
U112F	Communication Lost with Near Field Communication Module
U1130	Loss of serial communications for class 2 devices
U1131	Loss of serial communications for class 2 devices
U1132	Loss of serial communications for class 2 devices
U1133	Loss of serial communications for class 2 devices
U1134	Loss of serial communications for class 2 devices
U1135	Loss of serial communications for class 2 devices
U1136	Loss of serial communications for class 2 devices
U1137	Loss of serial communications for class 2 devices
U1138	Loss of serial communications for class 2 devices
U1139	Loss of serial communications for class 2 devices
U113B	Communication Lost with Radio Control Switch
U113C	Communication Lost with Windshield Light Sensor
U113D	Communication Lost with Front Seat Belt Retractor Motor Pretensioner - Left
U113E	Communication Lost with Front Seat Belt Retractor Motor Pretensioner - Right
U1140	Loss of serial communications for class 2 devices
U1141	Loss of serial communications for class 2 devices
U1142	Loss of serial communications for class 2 devices
U1143	Loss of serial communications for class 2 devices
U1144	Loss of Communications with PHN
U1145	Loss Of NAV Communications
U1146	Loss Of Onstar Communiction
U1147	Loss of serial communications for class 2 devices
U1148	Loss of serial communications for class 2 devices
U1149	Loss of serial communications for class 2 devices
U114A	Communication Lost with Headlamp Controller 1 - Right
U1150	Loss of serial communications for class 2 devices
U1151	Loss of serial communications for class 2 devices
U1152	Loss Of ACM Serial Data Communication
U1153	Loss of Communications with CCP
U1154	Loss of serial communications for class 2 devices
U1155	Loss of serial communications for class 2 devices
U1156	Loss of serial communications for class 2 devices
U1157	Loss of serial communications for class 2
U1158	Loss of serial communications for class 2 devices
U1159	Loss of serial communications for class 2 devices
U1160	Loss of Communications with DDM
U1161	Loss of PASS Door Module SBI
U1162	Loss of Rear Driver Door Module SBI
U1163	Loss of Rear PASS Door Module SBI
U1164	Loss Of DIM Serial Data Communication
U1165	Loss of serial communications for class 2 devices
U1166	Loss of Communications with SCM
U1167	Loss of serial communications for class 2 devices
U1168	Loss Of TTM Communications
U1169	Loss of Communications with MMM
U1170	Loss of Driver Door Switch SBI
U1171	Loss of serial communications for class 2 devices
U1172	Loss of serial communications for class 2 devices
U1173	Loss of serial communications for class 2 devices
U1174	Loss of serial communications for class 2 devices
U1175	Loss of serial communications for class 2 devices
U1176	Loss Of RightA Communications
U1177	Loss of serial communications for class 2 devices
U1178	Loss of serial communications for class 2 devices
U1179	Loss of serial communications for class 2 devices
U1180	Loss of serial communications for class 2 devices
U1181	Loss of serial communications for class 2 devices
U1182	Loss of serial communications for class 2 devices
U1183	Loss of serial communications for class 2 devices
U1184	Loss of serial communications for class 2 devices
U1185	Loss of serial communications for class 2 devices
U1186	Loss of serial communications for class 2 devices
U1187	Loss of serial communications for class 2 devices
U1188	Loss of serial communications for class 2 devices
U1189	Loss of serial communications for class 2 devices
U118A	Communication Lost with Power Steering Control Module
U118B	Communication Lost with Garage Door Opener Transmitter
U118E	(Engine) Lost Communication with Wireless Power Transfer Module 005E55
U1190	Loss of serial communications for class 2 devices
U1191	Loss of serial communications for class 2 devices
U1192	Loss of VTD Class 2 Serial Data Com
U1193	Loss of VIM Class 2 Communication
U1194	Loss of serial communications for class 2 devices
U1195	Loss of serial communications for class 2 devices
U1196	Loss of serial communications for class 2 devices
U1197	Loss of serial communications for class 2 devices
U1198	Loss of serial communications for class 2 devices
U1199	Loss of serial communications for class 2 devices
U119C	Communication Lost with UHF Low Energy Remote Control Access Sensor Transceiver 5
U119D	Communication Lost with UHF Low Energy Remote Control Access Sensor Transceiver 6
U119E	Communication Lost with UHF Low Energy Remote Control Access Sensor Transceiver 7
U119F	Communication Lost with UHF Low Energy Remote Control Access Sensor Transceiver 8
U11A5	Communication Lost with Charge Port Housing Lamp
U11C2	Communication Lost with Charging Interface Control Module
U11E3	Communication Lost with Rear Seat Back Bolster Memory Module - Left Secondary
U11FD	Communication Lost with Radio - Processor 2

U12

Code	Description
U1200	Loss of serial communications for class 2 devices
U1201	Loss of serial communications for class 2 devices
U1202	Loss of serial communications for class 2 devices
U1203	Loss of serial communications for class 2 devices
U1204	Loss of serial communications for class 2 devices
U1205	Loss of serial communications for class 2 devices
U1206	Loss of serial communications for class 2 devices
U1207	Loss of serial communications for class 2 devices
U1209	Loss of serial communications for class 2 devices
U120F	Communication Lost with Accessory Power Receptacle 1
U1210	Loss of serial communications for class 2 devices
U1211	Communication Lost with Accessory Power Receptacle 3
U1215	Loss of serial communications for class 2 devices
U1220	Loss of serial communications for class 2 devices
U1225	Loss of serial communications for class 2 devices
U1230	Loss of serial communications for class 2 devices
U1235	Loss of serial communications for class 2 devices
U1240	Loss of serial communications for class 2 devices
U1245	Loss of serial communications for class 2 devices
U1250	Loss of serial communications for class 2 devices
U1251	Loss of serial communications for class 2 devices
U1252	Loss of serial communications for class 2 devices
U1253	Loss of serial communications for class 2 devices
U1254	Loss of serial communications for class 2 devices
U1255	Serial Data Line Malfunction

U13

Code	Description
U1300	Class 2 Short to Ground
U1301	Class 2 Short to Battery
U1302	Programming request not received
U1303	Programming mode active message not received
U1304	Loss Of UART Communications
U1305	Class 2 Data Link Low or High
U130F	Invalid Data Received From Short Range Radar Sensor - Left Front
U1310	Invalid Data Received From Short Range Radar Sensor - Right Front
U1311	Invalid Data Received From Short Range Radar Sensor - Left/Center Rear
U1312	Invalid Data Received From Short Range Radar Sensor - Right Rear
U1314	Invalid Data Received From Engine Cooling Fan
U1315	Invalid Data Received From Engine Cooling Fan 2
U131D	Communication Lost with Fuel Pump Power Control Module
U1327	Invalid Data Received From Air Heater
U133D	Invalid Data Received From Folding Top Control Module - Left
U1345	Engine Control Module LIN Bus 1
U1346	Engine Control Module LIN Bus 2
U1347	Engine Control Module LIN Bus 3
U1348	Engine Control Module LIN Bus 4
U134A	Invalid Data Received From Headlamp Controller 1 - Left
U134B	Invalid Data Received From Headlamp Controller 1 - Right
U135A	Communication Lost with Shift to Park Range Actuator
U135B	Communication Lost with Sunload Sensor
U135C	Communication Lost with Stop/Start Capacitor Control Module
U135D	Communication Lost with Transmission Control Module on Chassis Control Module LIN Bus 2
U135E	Communication Lost with Transmission Control Module on Engine/Powertrain Control Module LIN Bus 1
U1366	Invalid Data Received From Short Range Radar Rear Side Sensor - Left
U1367	Invalid Data Received From Short Range Radar Rear Side Sensor - Right
U1369	Reductant Control Module Received Invalid Data From Body Control Module
U1371	Invalid Data Received From Barometric Pressure Sensor 2
U137B	Gear Shift Control Module Received Invalid Data From Body Control Module
U137C	Gear Shift Control Module Received Invalid Data From Serial Data Gateway Module
U137D	Gear Shift Control Module Received Invalid Data From Engine/Powertrain Control Module
U137E	Invalid Data Received From Heater Coolant Pump
U137F	Serial Data Gateway Module Received Invalid Data From Body Control Module
U1384	Invalid Data Received From Auxiliary Engine Coolant Fan 1
U138D	Invalid Data Received From Automatic Level Control Module
U13E6	Invalid Data Received From UHF Low Energy Remote Control Access Sensor Transceiver 2
U13E9	Invalid Data Received From UHF Low Energy Remote Control Access Sensor Transceiver 5
U13F9	Radio Received Invalid Data From Radio Display

U14

Code	Description
U1400	AD Link Malfunction
U1401	Lost communications between AD and ADG

U15

Code	Description
U1500	Inter-Device Dedicated Bus Malfunction
U1501	LIN Bus 1
U1502	LIN Bus 2
U1503	Body Control Module LIN Bus 4
U1507	Driver Seat Memory Control Module LIN Bus 1
U150B	Instrument Panel Cluster Control Module LIN Bus 1
U150C	Driver Seat Memory Control Module LIN Bus 2
U150E	Body Control Module LIN Bus 5
U1510	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 0 (B67 Ultrasonic Intrusion Sensor)
U1511	(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 1 (E13L Headlamp Assembly Left)
U1512	(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 2 (E13L Headlamp Assembly Left)
U1513	(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 3 (E13L Headlamp Assembly Left)
U1514	(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 4 (E13L Headlamp Assembly Left)
U1515	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 5 (M75 Windshield Wiper Motor)
U1516	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 6 (B110 Battery Sensor Module)
U1517	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 7 (Sunroof Sunshade Module)
U1518	Battery System Manager LIN Bus 1; Communication Lost with Device on LIN Bus
U1519	(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 9 (S52 Outside Rearview Mirror Switch)
U151A	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 10 (B117 Windshield Outside Moisture Sensor)
U151B	(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 11 (K61 Sunroof Control Module)
U151C	Communication Lost with Device on LIN Bus
U151E	Brake System Control Module LIN Bus 1
U1520	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 0 (P25 Power Sounder Content Theft Deterrent Alarm Module)
U1521	(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 1 (E13R Headlamp Assembly Right)
U1522	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 2 (K65 Tire Pressure Indicator Module)
U1523	(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 3 (E13R Headlamp Assembly Right)
U1524	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 4 (Front Seat Heating Control Module)
U1525	Communication Lost with Device on LIN Bus
U1526	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 6 (Rear Seat Heating Control Module)
U1527	Body Control Module LIN Bus 2
U1528	Communication Lost with Device on LIN Bus
U152A	Body Control Module LIN Bus 6; Communication Lost with Device on LIN Bus
U152B	Body Control Module LIN Bus 7; Communication Lost with Device on LIN Bus
U152C	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 12 (K18 Electronic Compass Module)
U152D	(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 13 (S3 Automatic Gearbox Change Lever)
U152E	Body Control Module LIN Bus 10
U152F	Body Control Module LIN Bus 11
U1530	(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 0 (M74P Window Motor - Passenger)
U1531	Body Control Module LIN Bus 13; Communication Lost with Device on LIN Bus
U1532	Communication Lost with Device on LIN Bus
U1533	Body Control Module LIN Bus 15
U1534	(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 4 (M74D Window Motor - Driver)
U1536	Passenger Seat Adjuster Memory Module LIN Bus 1
U1538	(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 8 (S79D Window Switch - Driver)
U153A	(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 10 (S79P Window Switch - Passenger)
U153C	Battery System Manager LIN Bus 5
U1540	(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 0 (M74Right Rear Window Motor - Right Rear)
U1544	(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 4 (M74Left Rear Window Motor - Left Rear)
U1548	(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 8 (S79Left Rear Window Switch - Left Rear)
U1549	Communication Lost with Device on LIN Bus
U154A	(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 10 (S79Right Rear Window Switch - Right Rear)
U154B	(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 11 (K49 Rear Seat Control Module)
U1550	Communication Lost with Device on LIN Bus
U1551	Communication Lost with Device on LIN Bus
U1555	Communication Lost with Device on LIN Bus
U1556	Communication Lost with Device on LIN Bus
U1558	Communication Lost with Device on LIN Bus
U1559	Communication Lost with Device on LIN Bus
U155D	Communication Lost with Device on LIN Bus
U156D	Communication Lost with Device on LIN Bus
U15E1	Communication Lost with Device on LIN Bus
U15F0	Communication Lost with Device on LIN Bus
U15F1	LIN Bus 15 Lost Communication with Device 1

U16

Code	Description
U1600	Communication Lost with Transmission Control Module on Engine/Powertrain Control Module LIN Bus 1
U1601	Restraint system dedicated bus #1 malfunction (Suppression system bus)
U1602	Communication Lost with Side Obstacle Detection Control Module - Left on CAN Bus 4
U1603	Restraint system dedicated bus #3 malfunction (SDM #2 system bus)
U1604	Communication Lost with Side Obstacle Detection Control Module - Left on Private CAN Bus
U1605	Communication Lost with Side Obstacle Detection Control Module - Right on Private CAN Bus
U1607	Communication Lost with Serial Data Gateway Module on CAN Bus 1
U1608	Communication Lost with Serial Data Gateway Module on CAN Bus 2
U1609	Communication Lost with Serial Data Gateway Module
U160A	Communication Lost with Serial Data Gateway Module on CAN Bus 8
U160B	Communication Lost with Parking Assist Control Module on CAN Bus 1
U160C	Communication Lost with Parking Assist Control Module on CAN Bus 2
U160D	Communication Lost with Battery Energy Control Module on CAN Bus 2
U160E	Communication Lost with Hybrid/EV Powertrain Control Module 2 on CAN Bus 3
U160F	Communication Lost with Brake System Control Module 1 on CAN Bus 1
U1610	Communication Lost with Brake System Control Module 1 on CAN Bus 2
U1611	Communication Lost with Engine/Powertrain Control Module on CAN Bus 2
U1612	Communication Lost with Hybrid/EV Powertrain Control Module 1 on CAN Bus 2
U1613	Communication Lost with Hybrid/EV Powertrain Control Module 1 on CAN Bus 3
U1614	Communication Lost with Image Processing Module 1 - Processor 1 on CAN Bus 1
U1615	Communication Lost with Image Processing Module 1 - Processor 1 on CAN Bus 2
U1616	Communication Lost with Image Processing Module 1 - Processor 1/Front View Camera on CAN Bus 8
U1617	Communication Lost with Drive Motor Control Module on CAN Bus 2
U161B	Communication Lost with Image Processing Module - Processor 2
U1623	Communication Lost with Image Processing Module 1 - Processor 2 on Ethernet Bus
U1624	Communication Lost with Telematic Control Module on Ethernet Bus
U1625	Communication Lost with Image Processing Module 1 - Processor 1 on Ethernet Bus
U1626	Communication Lost with Automated Driving Mapping Module on Ethernet Bus
U1627	Communication Lost with Serial Data Gateway Module on CAN Bus 9
U1628	Communication Lost with Brake System Control Module 2 on CAN Bus 10
U162E	Communication Lost with Automated Driving System Interface Module on CAN Bus 2
U162F	Communication Lost with Automated Driving System Interface Module on CAN Bus 9
U1630	Communication Lost with Automated Driving System Interface Module on CAN Bus 10
U1632	Communication Lost with Automated Driving System Interface Module 2 on CAN Bus 2
U1633	Communication Lost with Automated Driving System Interface Module 2 on CAN Bus 9
U1634	Communication Lost with Automated Driving System Interface Module 2 on CAN Bus 10
U1635	Communication Lost with Battery Energy Control Module 2 on CAN Bus 9
U1636	Communication Lost with Drive Motor Control Module on CAN Bus 9
U1638	Communication Lost with Redundant Power Supply Control Module on CAN Bus 2
U1639	Communication Lost with Brake System Control Module on CAN Bus 3
U163A	Communication Lost with Brake System Control Module 2 on CAN Bus 3
U163B	Communication Lost with Automated Driving System Interface Module 2 on CAN Bus 3
U163C	Communication Lost with Gear Shift Control Module on CAN Bus 1
U163D	Communication Lost with Image Processing Module - Processor 1 on CAN Bus 3
U163E	Communication Lost with Redundant Power Supply Control Module on CAN Bus 3
U1641	Communication Lost with Automated Driving Mapping Module
U1642	Communication Lost with Image Processing Module - Processor 2 on CAN Bus 8
U1643	Communication Lost with Transmission Control Module on CAN Bus 2
U1645	Communication Lost with Headlamp Control Module on CAN Bus 2
U1647	Communication Lost with Chassis Control Module on CAN Bus 3
U164A	Communication Lost with Serial Data Gateway Module on CAN Bus 4
U164B	Communication Lost with Serial Data Gateway Module on CAN Bus 5
U164C	Communication Lost with Infotainment Control Switch on CAN Bus 5
U164E	Communication Lost with Radio on CAN Bus 5
U164F	Communication Lost with Telematic Control Module on CAN Bus 5
U1650	Chassis system dedicated bus controller malfunction
U1651	Chassis system dedicated bus sensor #1 malfunction
U1652	Chassis system dedicated bus sensor #2 malfunction
U1653	Chassis Systems High Speed Communication Enable Circuit; Communication Lost with Drive Motor Control Module 3 on CAN Bus 2
U1654	Communication Lost with Drive Motor Control Module 3 on CAN Bus 9
U1655	Communication Lost with Drive Motor Control Module 2 on CAN Bus 9
U1657	Communication Lost with Drive Motor Control Module 3 on Private CAN Bus
U1659	Communication Lost with Battery Energy Control Module on CAN Bus 2
U165B	Communication Lost with Battery Energy Control Module 2 on CAN Bus 2
U165C	Communication Lost with Battery Energy Control Module 2 on CAN Bus 9
U165D	Communication Lost with Vehicle Status Information Module on CAN Bus 2
U165E	Communication Lost with Vehicle Status Information Module on CAN Bus 9
U1668	Communication Lost with Drive Motor Control Module 2 on CAN Bus 2
U166A	Communication Lost with Special Purpose Vehicle Control Module on CAN Bus 1
U166C	Communication Lost with Automated Driving System Interface Module on CAN Bus 3
U166D	Communication Lost with Infotainment Control Switch on Body Control Module LIN Bus 15
U166F	Communication Lost with Battery Energy Control Module on CAN Bus 9

U17

Code	Description
U1793	14 V Power Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus
U1795	14 V Power Module Powertrain Expansion Communication Bus Off
U179A	Lost Communication with Hybrid Powertrain Control Module 2
U179D	Communication Lost with Brake System Control Module 2 on Chassis Expansion Bus

U18

Code	Description
U1803	Lost Communication with Hybrid Powertrain Control Module 2
U1804	Communication Lost with Inside Rearview Mirror
U1806	Battery Energy Control Module High Voltage Energy Management Communication Bus Off
U1807	Battery Charger Control Module High Voltage Energy Management Communication Bus Off
U180A	Electric A/C Compressor Control Module High Speed Communication Bus Off
U180B	Battery Energy Control Module High Speed Communication Bus Off
U180C	Battery Charger Control Module High Speed Communication Bus Off
U180D	Electronic Brake Control Module Chassis Expansion Communication Bus Off
U1811	Battery Energy Control Module Powertrain Expansion CAN Bus Off
U1814	Powertrain Wake Up Communication Circuit; Powertrain Wake Up Communication Circuit Short to Battery; Powertrain Wake Up Communication Circuit Short to Ground; Powertrain Wake Up Communication Circuit Open; Powertrain Wake Up Communication Circuit Not Plausible
U1815	Lost Communication with Drive Motor Control Module A on Powertrain Expansion Communication Bus
U1816	Lost Communication with Drive Motor Control Module B on Powertrain Expansion Communication Bus
U1817	Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus
U1818	Lost Communication with Engine Control Module on Powertrain Expansion Communication Bus
U1821	Lost Communication with 14 V Power Module on Powertrain Expansion Communication Bus
U1826	Lost Communication With Multi-Axis Acceleration Sensor Module on Bus B (Chassis Expansion Bus)
U1827	Lost Communication With Steering Angle Sensor Module on Bus B (Chassis Expansion Bus)
U182B	Communication Lost with Transmission Control Module on Powertrain Expansion CAN Bus
U182D	Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182E	Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182F	Drive Motor Control Module 2 Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U1831	Drive Motor Control Module A Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus
U1833	Lost Communication with Electronic Brake Control Module on Chassis Expansion Communication Bus
U1838	Lost Communication with Battery Charger Control Module on High Voltage Energy Management Communication Bus
U1839	Auxiliary Transmission Fluid Pump Control Module Lost Communication with Engine Control Module
U183A	Lost Communication with OnStar Module
U183B	Auxiliary Transmission Fluid Pump Control Module Lost Communication with Transmission Control Module
U183C	Auxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U183E	Lost Communication with OnStar Module on Low Speed Communication Bus
U1844	Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus
U1845	Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module
U1846	Drive Motor Control Module 2 Lost Communication with Hybrid Powertrain Control Module
U1849	Drive Motor Control Module 1 Lost Communication with Transmission Control Module
U184A	Communication Lost with Body Control Module on Low Speed CAN Bus
U184B	Lost Communication with Electronic Climate Control Module on Low Speed Communication Bus
U184C	Lost Communication with Instrument Cluster on Low Speed Communication Bus
U184D	Lost Communication with Radio on Low Speed Communication Bus
U184E	Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed Communication Bus
U184F	Electric A/C Compressor Control Module Lost Communication with Engine Control Module
U1850	Drive Motor Control Module 2 Lost Communication with Transmission Control Module
U1858	Electronic Brake Control Module Lost Communication with Hybrid Powertrain Control Module on Chassis Expansion Communication Bus
U185A	Lost Communication with Battery Energy Control Module on High Voltage Energy Management Communication Bus
U185B	Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module 2 on High Voltage Energy Management Communication Bus
U185C	Battery Charger Control Module Lost Communication with Hybrid Powertrain Control Module 2 on High Voltage Energy Management Communication Bus
U185D	Fuel Injector Control Module Lost Communication with Engine Control Module
U185E	Fuel Injector Control Module Lost Communication with Body Control Module
U1860	Electric A/C Compressor Control Module Lost Communication with Hybrid Powertrain Control Module 2
U1861	Battery Charger Control Module Lost Communication with Engine Control Module
U1862	Battery Energy Control Module Lost Communication with Communication Gateway Module
U186A	Electronic Brake Control Module Lost Communication with Engine or Transmission Control Module
U186B	Electronic Brake Control Module Lost Communication with Transmission Control Module
U1876	Drive Motor Control Module 1 Lost Communication with Engine Control Module
U1879	Drive Motor Control Module 2 Lost Communication with Engine Control Module
U1885	Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module
U1886	Battery Energy Control Module Lost Communication with Engine Control Module
U1888	Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module
U18A2	Communication Lost with Fuel Pump Driver Control Module
U18A4	Communication Lost with Hybrid/EV Battery DC Charging Communication Gateway Module on High Voltage Energy Management CAN Bus
U18A6	Communication Lost with Right Object Detection Control Module on Dedicated Bus 1
U18A7	Communication Lost with Power Supply Transformer on Powertrain Expansion CAN Bus
U18A9	Communication Lost with Transmission Range Control Module on Chassis Expansion CAN Bus
U18AA	Transmission Range Control Module Lost Communication with Engine Control Module
U18AB	Transmission Range Control Module Lost Communication with Chassis Control Module on High Speed CAN Bus
U18AC	Transmission Range Control Module Lost Communication with Chassis Control Module on Chassis Expansion CAN Bus
U18AF	Communication Lost with Telematics Communicatiobn Interface Control Module
U18B0	Communication Lost with Instrument Cluster on Infotainment Ethernet Bus
U18B1	Communication Lost with Audio Amplifier on Infotainment Ethernet Bus
U18B2	Communication Lost with Rear Audio Control Module on Infotainment Ethernet Bus
U18B4	Communication Lost with Radio on Ethernet Bus
U18B5	Communication Lost with Hybrid Powertrain Control Module on Chassis Expansion CAN Bus
U18B6	Communication Lost with Hybrid Powertrain Control Module on Chassis Expansion CAN Bus
U18B9	Primary High Speed CAN Bus Subnet Configuration List
U18BB	Communication Lost with Power Steering Control Module on Chassis Expansion CAN Bus
U18BF	Secondary High Speed CAN Bus Subnet Configuration List
U18C2	Communication Lost with Frontview Camera Module on Flexray Bus
U18C3	Communication Lost with Video Processing Control Module on High Speed CAN Bus
U18C6	Gear Shift Control Module Lost Communication with Engine/Powertrain Control Module on Powertrain Sensor CAN Bus
U18C7	Gear Shift Control Module Lost Communication with Engine/Powertrain Control Module on CAN Bus 3
U18C8	Glow Plug Control Module Lost Communication with Engine Control Module
U18CA	Communication Lost with Active Safety Control Module 1 on Flexray Bus
U18CB	Communication Lost with Active Safety Control Module 2 on Flexray Bus
U18CC	Transmission Range Control Module Lost Communication with Engine Control Module on Powertrain Expansion Bus
U18D2	Communication Lost with Gear Shift Control Module on Powertrain Sensor CAN Bus
U18D3	Communication Lost with Gear Shift Control Module on CAN Bus 3
U18D5	Serial Data Gateway Module Lost Communication with Engine Control Module
U18D6	Serial Data Gateway Module Lost Communication with Hybrid/EV Powertrain Control Module 1
U18D7	Serial Data Gateway Module Lost Communication with Transmission Control Module
U18DB	Serial Data Gateway Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U18DC	Serial Data Gateway Module Lost Communication with Brake System Control Module 1
U18DD	Serial Data Gateway Module Lost Communication with Brake System Control Module 2
U18DE	Serial Data Gateway Module Lost Communication with Glow Plug Control Module
U18E0	Serial Data Gateway Module Lost Communication with Battery Energy Control Module
U18E1	Glow Plug Control Module Lost Communication with Serial Data Gateway Module
U18E2	Communication Lost with Multifunction Power Supply Converter on Powertrain Sensor Bus

U19

Code	Description
U1900	Lost Communication With Speech to Text Interface Module
U1901	Lost Communication With Front Controls Multifunction Interface Module
U1960	Message Authentication Keys Missing or Incomplete
U1961	Control Module Security Hardware Module Internal Fault
U1962	Unable to Authenticate Serial Data Message
U1963	Vehicle to Vehicle/Infrastructure Certificate Authentication
U1967	Telematic Control Module License Compliance Material - Data Transfer Circuit Fault
U196E	Wireless Accessory Charging Module License Compliance Material
U1972	Gear Shift Control Module Unable to Authenticate Serial Data Message
U1977	ECU Identification Self Learn Not Completed
U1978	Vehicle Identification Number of First Vehicle Configuration Mismatch
U1979	Ethernet Time Synchronization Configuration Mismatch
U197A	Ethernet Time Synchronization Signal Invalid
U197E	Odometer Vehicle Identification Number
U197F	Odometer Value Configuration Mismatch
U1983	Serial Data Gateway Module Security Hardware Module Internal Fault
U1984	Serial Data Gateway Module Unable to Authenticate Serial Data Message
U19A2	Infotainment Control Switch License Compliance Material

Other blocks

• P3Previous block
• All blocksChevrolet · GMC · Holden · Buick
• U2Next block

Makes that use these codes

• Chevrolet36 models
• GMC13 models
• Holden10 models
• Buick10 models
• Daewoo9 models
• Pontiac9 models
• Cadillac6 models
• Saturn6 models
• Oldsmobile4 models
• Hummer2 models

Code descriptions are shown in their source language; records without a translation stay raw. Source: CarCoding fault code database.