U11xx OBD-II Codes (U1100–U1199)

U1100 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1101 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1102 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1103 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1104 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1105 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1106 low

Invalid or Missing Serial Data / Communication Fault (manufacturer-specific; not a dedicated power-steering code)

U1107 low

Manufacturer-specific communication code — generic "Invalid/Missing Data for Legislated Diagnostics"; NOT a smart-key code. Confirm for your make.

U1108 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1109 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1110 low

Lost Communication With Clearance Warning / Sonar ECU (Toyota/Lexus)

U1111 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1112 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1113 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1114 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1115 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1116 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1117 moderate

Lost Communication With ABS — the TCM is not receiving the CAN signal from the ABS unit (Nissan)

U1118 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1119 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1120 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1121 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1122 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1123 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1124 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1125 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1126 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1127 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1128 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1129 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1130 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1131 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1132 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1133 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1134 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1135 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1136 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1137 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1138 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1139 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1140 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1141 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1142 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1143 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1144 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1145 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1146 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1147 critical

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1148 low

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1149 low

Lost Communication With Multi-Function Switch (Chrysler/Dodge/Jeep). NOTE: Nissan Around-View Monitor codes are in the U13xx range, not here.

U1150 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1151 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1152 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1153 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1154 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1155 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1156 moderate

SCP (J1850) Invalid or Missing Data for Digital Signal Processing (Ford / SAE J2178 SCP)

U1157 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1158 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1159 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1160 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1161 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1162 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1163 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1164 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1165 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1166 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1167 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1168 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1169 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1170 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1171 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1172 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1173 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1174 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1175 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1176 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1177 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1178 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1179 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1180 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1181 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1182 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1183 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1184 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1185 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1186 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1187 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1188 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1189 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1190 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1191 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1192 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1193 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1194 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1195 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1196 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1197 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1198 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information

U1199 moderate

Manufacturer-specific communication / control-module code — definition not reliably documented; its meaning varies by make, model, and year, so confirm it against your manufacturer's service information