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Network Codes

1,532 OBD-II diagnostic trouble codes in this category.

Showing page 12 of 16 (1,532 codes total)

Code Description Subsystem Severity
U1046 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1047 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1048 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1049 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1050 SCP (J1850) Invalid or Missing Data for Brakes CAN Bus Medium
U1051 SCP (J1850) Invalid or Missing Data for Brakes CAN Bus Medium
U1052 SCP (J1850) Invalid or Missing Data for Steering / Steering Wheel CAN Bus Medium
U1053 SCP (J1850) Invalid or Missing Data for Steering / Steering Wheel CAN Bus Medium
U1054 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1055 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1056 SCP (J1850) Invalid or Missing Data for Vehicle Configuration CAN Bus Medium
U1057 SCP (J1850) Invalid or Missing Data for Vehicle Configuration CAN Bus Medium
U1058 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL CAN Bus Medium
U1059 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL CAN Bus Medium
U1060 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1061 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1062 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1063 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1064 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1065 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1066 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1067 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1068 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1069 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1070 SCP (J1850) Invalid or Missing Data for Engine Sensors CAN Bus Medium
U1071 SCP (J1850) Invalid or Missing Data for Engine Sensors CAN Bus Medium
U1072 SCP (J1850) Invalid or Missing Data for Engine Coolant CAN Bus Medium
U1073 Lost Communication with Engine Control Module ECM Communication Critical
U1074 SCP (J1850) Invalid or Missing Data for Engine Oil CAN Bus Medium
U1075 SCP (J1850) Invalid or Missing Data for Engine Oil Temp CAN Bus Medium
U1076 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1077 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1078 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1079 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1080 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1081 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1082 SCP (J1850) Invalid or Missing Data for Engine Systems Other CAN Bus Medium
U1083 SCP (J1850) Invalid or Missing Data for Engine Systems Other CAN Bus Medium
U1084 SCP (J1850) Invalid or Missing Data for Powertrain Status Request CAN Bus Medium
U1085 SCP (J1850) Invalid or Missing Data for Powertrain Status Request CAN Bus Medium
U1086 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1087 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1088 SCP (J1850) Invalid or Missing Data for Suspension CAN Bus Medium
U1089 SCP (J1850) Invalid or Missing Data for Suspension CAN Bus Medium
U1090 SCP (J1850) Invalid or Missing Data for Non-Legislated Diagnostics CAN Bus Medium
U1091 SCP (J1850) Invalid or Missing Data for Non-Legislated Diagnostics CAN Bus Medium
U1092 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1093 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1094 SCP (J1850) Invalid or Missing Data for Experimental #2 CAN Bus Medium
U1095 SCP (J1850) Invalid or Missing Data for Experimental #2 CAN Bus Medium
U1096 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1097 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1098 SCP (J1850) Invalid or Missing Data for Vehicle Speed Control CAN Bus Medium
U1099 SCP (J1850) Invalid or Missing Data for Vehicle Speed Control CAN Bus Medium
U1100 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1101 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1102 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1103 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1104 SCP (J1850) Invalid or Missing Data for Chassis Status Request CAN Bus Medium
U1105 SCP (J1850) Invalid or Missing Data for Chassis Status Request CAN Bus Medium
U1106 SCP (J1850) Invalid or Missing Data for Legislated Diagnostics CAN Bus Medium
U1107 SCP (J1850) Invalid or Missing Data for Legislated Diagnostics CAN Bus Medium
U1108 SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter) CAN Bus Medium
U1109 SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter) CAN Bus Medium
U1110 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1111 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1112 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1113 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1114 SCP (J1850) Invalid or Missing Data for Charging System CAN Bus Medium
U1115 SCP (J1850) Invalid or Missing Data for Charging System CAN Bus Medium
U1116 SCP (J1850) Invalid or Missing Data for Electrical Energy Management CAN Bus Medium
U1117 SCP (J1850) Invalid or Missing Data for Electrical Energy Management CAN Bus Medium
U1118 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1119 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1120 Lost Communication with Air Suspension Module Suspension High
U1121 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1122 SCP (J1850) Invalid or Missing Data for Odometer CAN Bus Medium
U1123 SCP (J1850) Invalid or Missing Data for Odometer CAN Bus Medium
U1124 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1125 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1126 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1127 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1128 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1129 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1130 SCP (J1850) Invalid or Missing Data for Fuel System CAN Bus Medium
U1131 SCP (J1850) Invalid or Missing Data for Fuel System CAN Bus Medium
U1132 SCP (J1850) Invalid or Missing Data for Vehicle Motion CAN Bus Medium
U1133 SCP (J1850) Invalid or Missing Data for Vehicle Motion CAN Bus Medium
U1134 SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter CAN Bus Medium
U1135 SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter CAN Bus Medium
U1136 SCP (J1850) Invalid or Missing Data for Telltales CAN Bus Medium
U1137 SCP (J1850) Invalid or Missing Data for Telltales CAN Bus Medium
U1138 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1139 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1140 SCP (J1850) Invalid or Missing Data for Gateway CAN Bus Medium
U1141 SCP (J1850) Invalid or Missing Data for Gateway CAN Bus Medium
U1142 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1143 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1144 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
U1145 SCP (J1850) Invalid or Missing Data for Primary Id CAN Bus Medium
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All OBD-II Categories

About Network Codes

This page lists all 1,532 OBD-II diagnostic trouble codes classified under the Network category. These codes are stored by your vehicle's onboard computer when a sensor detects a malfunction in the network system. Each code begins with a letter indicating the system (P for Powertrain, B for Body, C for Chassis, U for Network) followed by four digits that identify the specific fault.

When your check engine light comes on, an OBD-II scanner reads these stored codes to help pinpoint the problem. Generic codes (where the second digit is 0) follow the SAE J2012 standard and mean the same thing on every vehicle. Manufacturer-specific codes (where the second digit is 1) may have different meanings depending on the vehicle brand.

Click any code in the table above to see its full description, possible causes, common symptoms, and step-by-step repair guidance. Use the search box to quickly find a specific code within this category.