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Home Error Codes A Complete list of OBD-II U Error Codes

A Complete list of OBD-II U Error Codes

November 6, 2024 | Victor Lukasso
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Error codes are five digits codes that help the driver identify possible reasons why the check engine light is flashing.

The check engine light alerts the driver that a fault needs to be fixed. It doesn’t categorically state the problem.

The function of the Onboard diagnostic scanner is to read and point out all the codes on a car with the specific location of the fault.

There are four categories of Error codes: P, B, C, and U, representing Powertrain, Body, Chassis, and Unknown, respectively.

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The P (Power train) Error codes are the most popular among them since it concerns the engine and other components that make up the proper functionality of the car.

However, the U Error Codes also play an essential role in the car’s makeup since they specify faults in a vehicle’s internet, software, and communication modules.

In this article, I’ll provide you with the complete list of Error codes starting with the U prefix and where the fault can be spotted.

List of OBD-II U Error Codes

U Error Codes range from U0000 to U4000, with a section for generic codes and manufacturer-specific errors.

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From U0000 to U1000 and U3000 to U4000 are generic codes set to international standards (ISO/SAE) to create a secure life cycle in the automotive sector.

While codes between U1000 to U3000 are manufacturer specific, the regulations here may differ from the ones set by your car manufacturers.

Nevertheless, consult your car manual or manufacturer’s website to find the tailored fixes for your car.

Without wasting much time, here’s a complete list of OBD-II U trouble codes.

U Codes
Trouble Code Fault Spots
U0000 – U0099 (Network Electrical)
U0001 Controller area network (CAN) data bus: high-speed bus/communication control module
U0002 Controller area network (CAN) data bus: high-speed bus – performance problem/ configuration error
U0003 Controller area network (CAN) data bus: high-speed bus(+)- open circuit
U0004 Controller area network (CAN) data bus: high-speed bus(+)- voltage low
U0005 Controller area network (CAN) data bus: high-speed bus(+)- voltage high
U0006 Controller area network (CAN) data bus: high-speed bus(-)- open circuit
U0007 Controller area network (CAN) data bus: high-speed bus (-)-voltage low
U0008 Controller area network (CAN) data bus: high-speed bus(-)- voltage high
U0009 Controller area network (CAN) data bus: high-speed bus (-)-shorted to the data bus(+)
U0010 Controller area network (CAN) data bus: medium-speed bus
U0011 Controller area network (CAN) data bus: medium speed bus – performance problem
U0012 Controller area network (CAN) data bus: medium speed bus(+)- open circuit
U0013 Controller area network (CAN) data bus: medium speed bus(+)- voltage low
U0014 Controller area network (CAN) data bus: medium speed bus(+)- voltage high
U0015 Controller area network (CAN) data bus: medium speed bus(-)
U0016 Controller area network (CAN) data bus: medium speed bus(-)- voltage low
U0017 Controller area network (CAN) data bus: medium speed bus(-)- voltage high
U0018 Controller area network (CAN) data bus: medium speed bus (-)-shorted to the data bus(+)
U0019 Controller area network (CAN) data bus: low-speed bus
U0020 Controller area network (CAN) data bus: low-speed bus – performance problem
U0021 Controller area network (CAN) data bus: low-speed bus (+) – open circuit
U0022 Controller area network (CAN) data bus: low-speed bus (+) – voltage low
U0023 Controller area network (CAN) data bus: low-speed bus (+) – voltage high
U0024 Controller area network (CAN) data bus: low-speed bus (-) – open circuit
U0025 Controller area network (CAN) data bus: low-speed bus (-) – voltage low
U0026 Controller area network (CAN) data bus: low-speed bus (-) – voltage high
U0027 Controller area network (CAN) data bus: low-speed bus (-) – shorted to the data bus (+)
U0028 Vehicle area network (VAN) data bus A
U0029 Vehicle area network (VAN) data bus A – performance problem
U0030 Vehicle area network (VAN) data bus A (+)- open circuit
U0031 Vehicle area network (VAN) data bus A (+)- voltage low
U0032 Vehicle area network (VAN) data bus A (+)- voltage high
U0033 Vehicle area network (VAN) data bus A (-)- open circuit
U0034 Vehicle area network (VAN) data bus A (-)- voltage low
U0035 Vehicle area network (VAN) data bus A (-)- voltage high
U0036 Vehicle area network (VAN) data bus A (-)- shorted to data bus A (+)
U0037 Vehicle area network (VAN) data bus B
U0038 Vehicle area network (VAN) data bus B – performance problem
U0039 Vehicle area network (VAN) data bus B (+)- open circuit
U0040 Vehicle area network (VAN) data bus B (+)- voltage low
U0041 Vehicle area network (VAN) data bus B (+)- voltage high
U0042 Vehicle area network (VAN) data bus B (-)- open circuit
U0043 Vehicle area network (VAN) data bus B (-)- voltage low
U0044 Vehicle area network (VAN) data bus B (-)- voltage high
U0045 Vehicle area network (VAN) data bus B (-)- shorted to data bus B (+)
U0046 Vehicle area network (VAN) data bus C
U0047 Vehicle area network (VAN) data bus C – performance problem
U0048 Vehicle area network (VAN) data bus C (+)- open circuit
U0049 Vehicle area network (VAN) data bus C (+)- voltage low
U0050 Vehicle area network (VAN) data bus C (+)- voltage high
U0051 Vehicle area network (VAN) data bus C (-)- open circuit
U0052 Vehicle area network (VAN) data bus C (-)- voltage low
U0053 Vehicle area network (VAN) data bus C (-)- voltage high
U0054 Vehicle area network (VAN) data bus C (-)- shorted to data bus C (+)
U0055 Vehicle area network (VAN) data bus D
U0056 Vehicle area network (VAN) data bus D- performance problem
U0057 Vehicle area network (VAN) data bus D (+)- open circuit
U0058 Vehicle area network (VAN) data bus D (+)- voltage low
U0059 Vehicle area network (VAN) data bus D (+)- voltage high
U0060 Vehicle area network (VAN) data bus D (-)- open circuit
U0061 Vehicle area network (VAN) data bus D (-)- voltage low
U0062 Vehicle area network (VAN) data bus D (-)- voltage high
U0063 Vehicle area network (VAN) data bus D (-)- shorted to data bus D (+)
U0064 Vehicle area network (VAN) data bus E
U0065 Vehicle area network (VAN) data bus E – performance problem
U0066 Vehicle area network (VAN) data bus E (+)- open circuit
U0067 Vehicle area network (VAN) data bus E (+)- voltage low
U0068 Vehicle area network (VAN) data bus E (+)- voltage high
U0069 Vehicle area network (VAN) data bus E (-)- open circuit
U0070 Vehicle area network (VAN) data bus E (-)- voltage low
U0071 Vehicle area network (VAN) data bus E (-)- voltage high
U0072 Vehicle area network (VAN) data bus E (-)- shorted to data bus E (+)
U0073 Control module – data bus Off
U0100 – U0199 (Network communications)
U0100 Data bus: engine control module (ECM) A – no communication
U0101 Data bus: transmission control module (TCM) – no communication
U0102 Data bus: transfer box control module – no communication
U0103 Data bus: gear shift module – no communication / System relay – low signal
U0104 Data bus: cruise control module – no communication
U0105 Data bus: injector control module – no communication
U0106 Data bus: glow plug control module – no communication
U0107 Data bus: throttle actuator control (TAC) module – no communication
U0108 Data bus: alternative fuel control module – no communication
U0109 Data bus: fuel pump (FP) control module – no communication
U0110 Data bus: drive motor control module – no communication
U0111 Data bus: battery energy control module A – no communication
U0112 Data bus: battery energy control module B – no communication
U0113 Data bus: emissions critical control information – no communication
U0114 Data bus: four-wheel drive clutch control module – no communication
U0115 Data bus: engine control module (ECM) B – no communication
U0121 Data bus: anti-lock brake system (ABS) control module – no communication
U0122 Data bus: vehicle dynamics control module – no communication
U0123 Data bus: yaw rate sensor module – no communication
U0124 Data bus: lateral acceleration sensor module – no communication
U0125 Data bus: multi-axis acceleration sensor module – no communication
U0126 Data bus: steering position sensor control module – no communication
U0127 Data bus: tire pressure monitor module- no communication
U0128 Data bus: parking brake control module – no communication
U0129 Data bus: brake system control module – no communication
U0130 Data bus: steering effort control module – no communication
U0131 Data bus: power steering control module – no communication
U0132 Data bus: suspension ride height control module – no communication
U0140 Data bus: body control module (8CM)- no communication
U0141 Data bus: body control module (8CM) A- no communication
U0142 Data bus: body control module (8CM) 8 – no communication
U0143 Data bus: body control module (8CM) C- no communication
U0144 Data bus: body control module (8CM) D- no communication
U0145 Data bus: body control module (8CM) E – no communication
U0146 Data bus: gateway A- no communication
U0147 Data bus: gateway 8 – no communication
U0148 Data bus: gateway C – no communication
U0149 Data bus: gateway D- no communication
U0150 Data bus: gateway E – no communication
U0151 Data bus: supplementary restraint system (SRS) control module – no communication
U0152 Data bus: supplementary restraint system (SRS) control module: left – no communication
U0153 Data bus: supplementary restraint system (SRS) control module: right – no communication
U0154 Data bus: supplementary restraint system (SRS) occupant sensing control module- no communication
U0155 Data bus: instrumentation control module – no communication
U0156 Data bus: information center A – no communication
U0157 Data bus: information center B – no communication
U0158 Data bus: head-up display – no communication
U0159 Data bus: parking aid control module A – no communication
U0160 Data bus: audible alert control module – no communication
U0161 Data bus: compass module – no communication
U0162 Data bus: navigation display module – no communication
U0163 Data bus: navigation control module – no communication
U0164 Data bus: NC control module – no communication
U0165 Data bus: NC control module: rear
U0166 Data bus: auxiliary heater control module – no communication
U0167 Data bus: immobilizer control’ module – no communication / Engine control module – internal fault
U0168 Data bus: alarm system control module – no communication
U0169 Data bus: sunroof control module – no communication
U0170 Data bus: supplementary restraint system (SRS) sensor A – no communication
U0171 Data bus: supplementary restraint system (SRS) sensor B – no communication
U0172 Data bus: supplementary restraint system (SRS) sensor C – no communication
U0173 Data bus: supplementary restraint system (SRS) sensor D – no communication
U0174 Data bus: supplementary restraint system (SRS) sensor E – no communication
U0175 Data bus: supplementary restraint system (SRS) sensor F – no communication
U0176 Data bus: supplementary restraint system (SRS) sensor G – no communication
U0177 Data bus: supplementary restraint system (SRS) sensor H – no communication
U0178 Data bus: supplementary restraint system (SRS) sensor I – no communication
U0179 Data bus: supplementary restraint system (SRS) sensor J – no communication
U0180 Data bus: automatic lighting control module – no communication
U0181 Data bus: headlamp level control module – no communication
U0182 Data bus: lamps control module: front – no communication
U0183 Data bus: lamps control module: rear- no communication
U0184 Data bus: radio – no communication
U0185 Data bus: aerial module – no communication
U0186 Data bus: audio unit output amplifier- no communication
U0187 Data bus: digital disc player/changer module A – no communication
U0188 Data bus: digital disc player/changer module B – no communication
U0189 Data bus: digital disc player/changer module C – no communication
U0190 Data bus: digital disc player/changer module D – no communication
U0191 Data bus: television – no communication
U0192 Data bus: personal computer – no communication
U0193 Data bus: digital audio control module A- no communication
U0194 Data bus: digital audio control module B – no communication
U0195 Data bus: subscription entertainment receiver module – no communication
U0196 Data bus: entertainment control module: rear – no communication
U0197 Data bus: t.elephone control module – no communication
U0198 Data bus: telematics control module – no communication
U0199 Data bus: door function control module A – no communication
U0200 – U0299 (Network communications)
U0200 Data bus: door function control module B – no communication
U0201 Data bus: door function control module C – no communication
U0202 Data bus: door function control module D – no communication
U0203 Data bus: door function control module E – no communication
U0204 Data bus: door function control module F – no communication
U0205 Data bus: door function control module G – no communication
U0206 Data bus: convertible top control module – no communication
U0207 Data bus: moveable roof control module – no communication
U0208 Data bus: seat adjustment control module A – no communication
U0209 Data bus: seat adjustment control module B – no communication
U0210 Data bus: seat adjustment control module C – no communication
U0211 Data bus: seat adjustment control module D – no communication
U0212 Data bus: steering column control module – no communication
U0213 Data bus: mirror control module A – no communication
U0214 Data bus: remote function actuation – no communication
U0215 Data bus: door contact switch A – no communication
U0216 Data bus: door contact switch B – no communication
U0217 Data bus: door contact switch C – no communication
U0218 Data bus: door contact switch D – no communication
U0219 Data bus: door contact switch E – no communication
U0220 Data bus: door contact switch F – no communication
U0221 Data bus: door contact switch G – no communication
U0222 Data bus: electric window motor A- no communication
U0223 Data bus: electric window motor B – no communication
U0224 Data bus: electric window motor C – no communication
U0225 Data bus: electric window motor D – no communication
U0226 Data bus: electric window motor E – no communication
U0227 Data bus: electric window motor F – no communication
U0228 Data bus: electric window motor G – no communication
U0229 Data bus: heated steering wheel module – no communication
U0230 Data bus: tailgate control module – no communication
U0231 Data bus: rain sensor control module- no communication
U0232 Data bus: side obstacle detection control module: left – no communication
U0233 Data bus: side obstacle detection control module: right- no communication
U0234 Data bus: convenience recall module – no communication
U0235 Data bus: cruise control front distance range sensor – no communication
U0253 Lost Communication With Accessory Protocol Interface Module
U0284 Lost Communication With Active Grille Air Shutter 1 Motor Module
U0293 Data bus: HVAC control unit- no communication
U029D Lost Communication With NOX Sensor A
P0300 – U0399 (Network software)
U0300 Control module – internal software incompatibility
U0301 Software incompatibility – engine control module (ECM)
U0302 Software incompatibility – transmission control module (TCM)
U0303 Software incompatibility – transfer box control module
U0304 Software incompatibility – gear shift module
U0305 Software incompatibility – cruise control module
U0306 Software incompatibility – injector control module
U0307 Software incompatibility – glow plug control module
U0308 Software incompatibility – throttle actuator control (TAC) module
U0309 Software incompatibility – alternative fuel control module
U0310 Software incompatibility – fuel pump (FP) control module
U0311 Software incompatibility – drive motor control module
U0312 Software incompatibility – battery energy control module A
U0313 Software incompatibility – battery energy control module B
U0314 Software incompatibility – four-wheel drive clutch control module
U0315 Software incompatibility – anti-lock brake system (ASS) control module
U0316 Software incompatibility – vehicle dynamics control module
U0317 Software incompatibility – parking brake control module
U0318 Software incompatibility – brake system control module
U0319 Software incompatibility – steering effort control module
U0320 Software incompatibility – power steering control module
U0321 Software incompatibility – suspension ride height control module
U0322 Software incompatibility – body control module
U0323 Software incompatibility – instrumentation control module
U0324 Software incompatibility – AlC control module
U0325 Software incompatibility – auxiliary heater control module
U0326 Software incompatibility – immobilizer control module
U0327 Software incompatibility – alarm system control module
U0328 Software incompatibility – steering position sensor control module
U0329 Software incompatibility – steering column control module
U0330 Software incompatibility – tire pressure monitor module
U0331 Software incompatibility – body control module A
U0332 Software incompatibility – multi-axis acceleration sensor module
P0400 – U0499 (Network data)
U0400 Invalid data received
U0401 Invalid data received – engine control module (ECM)
U0402 Invalid data received – transmission control module (TCM)
U0403 Invalid data received – transfer box control module
U0404 Invalid data received – gear shift module
U0405 Invalid data received – cruise control module
U0406 Invalid data received – injector control module
U0407 Invalid data received – glow plug control module
U0408 Invalid data received – throttle actuator control (TAC) module
U0409 Invalid data received – alternative fuel control module
U0410 Invalid data received – fuel pump (FP) control module
U0411 Invalid data received -drive motor control module
U0412 Invalid data received – battery energy control module A
U0413 Invalid data received – battery energy control module B
U0414 Invalid data received – four-wheel drive clutch control module
U0415 Invalid data received – anti-lock brake system (ABS) control module
U0416 Invalid data received – vehicle dynamics control module
U0417 Invalid data received – parking brake control module
U0418 Invalid data received – brake system control module
U0419 Invalid data received – steering effort control module
U0420 Invalid data received – power steering control module
U0421 Invalid data received – suspension ride height control module
U0422 Invalid data received – body control module
U0423 Invalid data received – instrumentation control module
U0424 Invalid data received – A/C control module
U0425 Invalid data received – auxiliary heater control module
U0426 Invalid data received – immobilizer
U0427 Invalid data received – alarm system control module
U0428 Invalid data received – steering position sensor control module
U0429 Invalid data received – steering column control module
U0430 Invalid data received – tire pressure monitor module
U0431 Invalid data received – body control module A
U0433 Invalid data received – cruise control front distance range sensor
U0481 Invalid Data Received From Automatic Lighting Control Module
U1000 – U2000 (Manufacturer defined, common definition listed)
U1000 SCP (J1850) Invalid or Missing Data for Primary Id
U1001 SCP (J1850) Invalid or Missing Data for Primary Id
U1002 SCP (J1850) Invalid or Missing Data for Primary Id
U1003 SCP (J1850) Invalid or Missing Data for Primary Id
U1004 SCP (J1850) Invalid or Missing Data for EEC Programming
U1005 SCP (J1850) Invalid or Missing Data for EEC Programming
U1006 SCP (J1850) Invalid or Missing Data for Primary Id
U1007 SCP (J1850) Invalid or Missing Data for Primary Id
U1008 SCP (J1850) Invalid or Missing Data for Engine Torque
U1009 SCP (J1850) Invalid or Missing Data for Engine Torque
U1010 SCP (J1850) Invalid or Missing Data for Engine Air Intake
U1011 SCP (J1850) Invalid or Missing Data for Engine Air Intake
U1012 SCP (J1850) Invalid or Missing Data for Primary Id
U1013 SCP (J1850) Invalid or Missing Data for Primary Id
U1014 SCP (J1850) Invalid or Missing Data for Primary Id
U1015 SCP (J1850) Invalid or Missing Data for Primary Id
U1016 SCP (J1850) Invalid or Missing Data for Primary Id
U1017 SCP (J1850) Invalid or Missing Data for Primary Id
U1018 SCP (J1850) Invalid or Missing Data for Throttle
U1019 SCP (J1850) Invalid or Missing Data for Throttle
U1020 SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch
U1021 SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch
U1022 SCP (J1850) Invalid or Missing Data for Primary Id
U1023 SCP (J1850) Invalid or Missing Data for Primary Id
U1024 SCP (J1850) Invalid or Missing Data for Primary Id
U1025 SCP (J1850) Invalid or Missing Data for Primary Id
U1026 SCP (J1850) Invalid or Missing Data for Engine RPM
U1027 SCP (J1850) Invalid or Missing Data for Engine RPM
U1028 SCP (J1850) Invalid or Missing Data for Primary Id
U1029 SCP (J1850) Invalid or Missing Data for Primary Id
U1030 SCP (J1850) Invalid or Missing Data for Experimental #1
U1031 SCP (J1850) Invalid or Missing Data for Experimental #1
U1032 SCP (J1850) Invalid or Missing Data for Primary Id
U1033 SCP (J1850) Invalid or Missing Data for Primary Id
U1034 SCP (J1850) Invalid or Missing Data for Primary Id
U1035 SCP (J1850) Invalid or Missing Data for Primary Id
U1036 SCP (J1850) Invalid or Missing Data for Wheels
U1037 SCP (J1850) Invalid or Missing Data for Wheels
U1038 SCP (J1850) Invalid or Missing Data for Primary Id
U1039 SCP (J1850) Invalid or Missing Data for Primary Id / Vehicle Speed
U1040 SCP (J1850) Invalid or Missing Data for Vehicle Speed
U1041 SCP (J1850) Invalid or Missing Data for Vehicle Speed
U1042 SCP (J1850) Invalid or Missing Data for Traction Control
U1043 SCP (J1850) Invalid or Missing Data for Traction Control
U1044 SCP (J1850) Invalid or Missing Data for Traction Motor
U1045 SCP (J1850) Invalid or Missing Data for Traction Motor
U1046 SCP (J1850) Invalid or Missing Data for Primary Id
U1047 SCP (J1850) Invalid or Missing Data for Primary Id
U1048 SCP (J1850) Invalid or Missing Data for Primary Id
U1049 SCP (J1850) Invalid or Missing Data for Primary Id
U1050 SCP (J1850) Invalid or Missing Data for Brakes
U1051 SCP (J1850) Invalid or Missing Data for Brakes
U1052 SCP (J1850) Invalid or Missing Data for Steering / Steering Wheel
U1053 SCP (J1850) Invalid or Missing Data for Steering / Steering Wheel
U1054 SCP (J1850) Invalid or Missing Data for Primary Id
U1055 SCP (J1850) Invalid or Missing Data for Primary Id
U1056 SCP (J1850) Invalid or Missing Data for Vehicle Configuration
U1057 SCP (J1850) Invalid or Missing Data for Vehicle Configuration
U1058 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
U1059 SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL
U1060 SCP (J1850) Invalid or Missing Data for Primary Id
U1061 SCP (J1850) Invalid or Missing Data for Primary Id
U1062 SCP (J1850) Invalid or Missing Data for Primary Id
U1063 SCP (J1850) Invalid or Missing Data for Primary Id
U1064 SCP (J1850) Invalid or Missing Data for Primary Id
U1065 SCP (J1850) Invalid or Missing Data for Primary Id
U1066 SCP (J1850) Invalid or Missing Data for Primary Id
U1067 SCP (J1850) Invalid or Missing Data for Primary Id
U1068 SCP (J1850) Invalid or Missing Data for Primary Id
U1069 SCP (J1850) Invalid or Missing Data for Primary Id
U1070 SCP (J1850) Invalid or Missing Data for Engine Sensors
U1071 SCP (J1850) Invalid or Missing Data for Engine Sensors
U1072 SCP (J1850) Invalid or Missing Data for Engine Coolant
U1073 Bus-Off (Mitsubishi)
SCP (J1850) Invalid or Missing Data for Engine Coolant (GM)
SCP (J1850) Invalid or Missing Data for Engine Coolant (Ford)
U1074 SCP (J1850) Invalid or Missing Data for Engine Oil
U1075 SCP (J1850) Invalid or Missing Data for Engine Oil Temp
U1076 SCP (J1850) Invalid or Missing Data for Primary Id
U1077 SCP (J1850) Invalid or Missing Data for Primary Id
U1078 SCP (J1850) Invalid or Missing Data for Primary Id
U1079 SCP (J1850) Invalid or Missing Data for Primary Id
U1080 SCP (J1850) Invalid or Missing Data for Primary Id
U1081 SCP (J1850) Invalid or Missing Data for Primary Id
U1082 SCP (J1850) Invalid or Missing Data for Engine Systems Other
U1083 SCP (J1850) Invalid or Missing Data for Engine Systems Other
U1084 SCP (J1850) Invalid or Missing Data for Powertrain Status Request
U1085 SCP (J1850) Invalid or Missing Data for Powertrain Status Request
U1086 SCP (J1850) Invalid or Missing Data for Primary Id
U1087 SCP (J1850) Invalid or Missing Data for Primary Id
U1088 SCP (J1850) Invalid or Missing Data for Suspension
U1089 SCP (J1850) Invalid or Missing Data for Suspension
U1090 SCP (J1850) Invalid or Missing Data for Non-Legislated Diagnostics
U1091 SCP (J1850) Invalid or Missing Data for Non-Legislated Diagnostics
U1092 SCP (J1850) Invalid or Missing Data for Primary Id
U1093 SCP (J1850) Invalid or Missing Data for Primary Id
U1094 SCP (J1850) Invalid or Missing Data for Experimental #2
U1095 SCP (J1850) Invalid or Missing Data for Experimental #2
U1096 SCP (J1850) Invalid or Missing Data for Primary Id
U1097 SCP (J1850) Invalid or Missing Data for Primary Id
U1098 SCP (J1850) Invalid or Missing Data for Vehicle Speed Control
U1099 SCP (J1850) Invalid or Missing Data for Vehicle Speed Control
U1100 SCP (J1850) Invalid or Missing Data for Primary Id
U1101 SCP (J1850) Invalid or Missing Data for Primary Id
U1102 SCP (J1850) Invalid or Missing Data for Primary Id
U1103 SCP (J1850) Invalid or Missing Data for Primary Id
U1104 SCP (J1850) Invalid or Missing Data for Chassis Status Request
U1105 SCP (J1850) Invalid or Missing Data for Chassis Status Request
U1106 SCP (J1850) Invalid or Missing Data for Legislated Diagnostics
U1107 SCP (J1850) Invalid or Missing Data for Legislated Diagnostics
U1108 SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter)
U1109 SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter)
U1110 A/C-ECU Timeout
U1111 SCP (J1850) Invalid or Missing Data for Primary Id
U1112 SCP (J1850) Invalid or Missing Data for Primary Id
U1113 SCP (J1850) Invalid or Missing Data for Primary Id
U1114 SCP (J1850) Invalid or Missing Data for Charging System
U1115 SCP (J1850) Invalid or Missing Data for Charging System
U1116 SCP (J1850) Invalid or Missing Data for Electrical Energy Management
U1117 SCP (J1850) Invalid or Missing Data for Electrical Energy Management
U1118 SCP (J1850) Invalid or Missing Data for Primary Id
U1119 SCP (J1850) Invalid or Missing Data for Primary Id
U1120 SCP (J1850) Invalid or Missing Data for Primary Id
U1121 SCP (J1850) Invalid or Missing Data for Primary Id
U1122 SCP (J1850) Invalid or Missing Data for Odometer
U1123 SCP (J1850) Invalid or Missing Data for Odometer
U1124 SCP (J1850) Invalid or Missing Data for Primary Id
U1125 SCP (J1850) Invalid or Missing Data for Primary Id
U1126 SCP (J1850) Invalid or Missing Data for Primary Id
U1127 SCP (J1850) Invalid or Missing Data for Primary Id
U1128 SCP (J1850) Invalid or Missing Data for Primary Id
U1129 SCP (J1850) Invalid or Missing Data for Primary Id
U1130 SCP (J1850) Invalid or Missing Data for Fuel System
U1131 SCP (J1850) Invalid or Missing Data for Fuel System
U1132 SCP (J1850) Invalid or Missing Data for Vehicle Motion
U1133 SCP (J1850) Invalid or Missing Data for Vehicle Motion
U1134 SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter
U1135 SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter
U1136 SCP (J1850) Invalid or Missing Data for Telltales
U1137 SCP (J1850) Invalid or Missing Data for Telltales
U1138 SCP (J1850) Invalid or Missing Data for Primary Id
U1139 SCP (J1850) Invalid or Missing Data for Primary Id
U1140 SCP (J1850) Invalid or Missing Data for Gateway
U1141 SCP (J1850) Invalid or Missing Data for Gateway
U1142 SCP (J1850) Invalid or Missing Data for Primary Id
U1143 SCP (J1850) Invalid or Missing Data for Primary Id
U1144 SCP (J1850) Invalid or Missing Data for Primary Id
U1145 SCP (J1850) Invalid or Missing Data for Primary Id
U1146 SCP (J1850) Invalid or Missing Data for Vehicle Security
U1147 SCP (J1850) Invalid or Missing Data for Vehicle Security
U1148 SCP (J1850) Invalid or Missing Data for Audio Control
U1149 SCP (J1850) Invalid or Missing Data for Audio Control
U1150 SCP (J1850) Invalid or Missing Data for Audible Warnings
U1151 SCP (J1850) Invalid or Missing Data for Audible Warnings
U1152 SCP (J1850) Invalid or Missing Data for Experimental #3
U1153 SCP (J1850) Invalid or Missing Data for Experimental #3
U1154 SCP (J1850) Invalid or Missing Data for Compact Disc
U1155 SCP (J1850) Invalid or Missing Data for Compact Disc
U1156 SCP (J1850) Invalid or Missing Data for Digital Signal Processing
U1157 SCP (J1850) Invalid or Missing Data for Digital Signal Processing
U1158 SCP (J1850) Invalid or Missing Data for Antenna
U1159 SCP (J1850) Invalid or Missing Data for Antenna
U1160 SCP (J1850) Invalid or Missing Data for Primary Id
U1161 SCP (J1850) Invalid or Missing Data for Primary Id
U1162 SCP (J1850) Invalid or Missing Data for Digital Audio Tape
U1163 SCP (J1850) Invalid or Missing Data for Digital Audio Tape
U1164 SCP (J1850) Invalid or Missing Data for Tuner / Receiver
U1165 SCP (J1850) Invalid or Missing Data for Tuner / Receiver
U1166 SCP (J1850) Invalid or Missing Data for Cassette Tape
U1167 SCP (J1850) Invalid or Missing Data for Cassette Tape
U1168 SCP (J1850) Invalid or Missing Data for Primary Id
U1169 SCP (J1850) Invalid or Missing Data for Primary Id
U1170 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System
U1171 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System
U1172 SCP (J1850) Invalid or Missing Data for Remote Button Control
U1173 SCP (J1850) Invalid or Missing Data for Remote Button Control
U1174 SCP (J1850) Invalid or Missing Data for Primary Id
U1175 SCP (J1850) Invalid or Missing Data for Primary Id
U1176 SCP (J1850) Invalid or Missing Data for Primary Id
U1177 SCP (J1850) Invalid or Missing Data for Primary Id
U1178 SCP (J1850) Invalid or Missing Data for Climate Control (HVAC)
U1179 SCP (J1850) Invalid or Missing Data for Climate Control (HVAC)
U1180 SCP (J1850) Invalid or Missing Data for Personalization (Memory) Features
U1181 SCP (J1850) Invalid or Missing Data for Personalization (Memory) Features
U1182 SCP (J1850) Invalid or Missing Data for Primary Id
U1183 SCP (J1850) Invalid or Missing Data for Primary Id
U1184 SCP (J1850) Invalid or Missing Data for Window Wiper / Washer
U1185 SCP (J1850) Invalid or Missing Data for Window Wiper / Washer
U1186 SCP (J1850) Invalid or Missing Data for Primary Id
U1187 SCP (J1850) Invalid or Missing Data for Primary Id
U1188 SCP (J1850) Invalid or Missing Data for Primary Id
U1189 SCP (J1850) Invalid or Missing Data for Primary Id
U1190 SCP (J1850) Invalid or Missing Data for Primary Id
U1191 SCP (J1850) Invalid or Missing Data for Primary Id
U1192 SCP (J1850) Invalid or Missing Data for Primary Id
U1193 SCP (J1850) Invalid or Missing Data for Primary Id
U1194 SCP (J1850) Invalid or Missing Data for Mirrors
U1195 SCP (J1850) Invalid or Missing Data for Mirrors
U1196 SCP (J1850) Invalid or Missing Data for Door Locks
U1197 SCP (J1850) Invalid or Missing Data for Door Locks
U1198 SCP (J1850) Invalid or Missing Data for External Access (Doors)
U1199 SCP (J1850) Invalid or Missing Data for External Access (Doors)
U1200 SCP (J1850) Invalid or Missing Data for Seat Motion / Control
U1201 SCP (J1850) Invalid or Missing Data for Seat Motion / Control
U1202 SCP (J1850) Invalid or Missing Data for Windows
U1203 SCP (J1850) Invalid or Missing Data for Windows
U1204 SCP (J1850) Invalid or Missing Data for Steering Column
U1205 SCP (J1850) Invalid or Missing Data for Steering Column
U1206 SCP (J1850) Invalid or Missing Data for Primary Id
U1207 SCP (J1850) Invalid or Missing Data for Primary Id
U1208 SCP (J1850) Invalid or Missing Data for Seat Switches
U1209 SCP (J1850) Invalid or Missing Data for Seat Switches
U1210 SCP (J1850) Invalid or Missing Data for Restraints
U1211 SCP (J1850) Invalid or Missing Data for Restraints
U1212 SCP (J1850) Invalid or Missing Data for Primary Id
U1213 SCP (J1850) Invalid or Missing Data for Primary Id
U1214 SCP (J1850) Invalid or Missing Data for Primary Id
U1215 SCP (J1850) Invalid or Missing Data for Primary Id
U1216 SCP (J1850) Invalid or Missing Data for External Lamp Outage
U1217 SCP (J1850) Invalid or Missing Data for External Lamp Outage
U1218 SCP (J1850) Invalid or Missing Data for External Lamps
U1219 SCP (J1850) Invalid or Missing Data for External Lamps
U1220 SCP (J1850) Invalid or Missing Data for Interior Lamp Outage
U1221 SCP (J1850) Invalid or Missing Data for Interior Lamp Outage
U1222 SCP (J1850) Invalid or Missing Data for Interior Lamps
U1223 SCP (J1850) Invalid or Missing Data for Interior Lamps
U1224 SCP (J1850) Invalid or Missing Data for Primary Id
U1225 SCP (J1850) Invalid or Missing Data for Primary Id
U1226 SCP (J1850) Invalid or Missing Data for Body Status Request
U1227 SCP (J1850) Invalid or Missing Data for Body Status Request
U1228 SCP (J1850) Invalid or Missing Data for Tires
U1229 SCP (J1850) Invalid or Missing Data for Tires
U1230 SCP (J1850) Invalid or Missing Data for Electric Defrost
U1231 SCP (J1850) Invalid or Missing Data for Electric Defrost
U1232 SCP (J1850) Invalid or Missing Data for Navigation
U1233 SCP (J1850) Invalid or Missing Data for Navigation
U1234 SCP (J1850) Invalid or Missing Data for Displays
U1235 SCP (J1850) Invalid or Missing Data for Displays
U1236 SCP (J1850) Invalid or Missing Data for Memory Storage
U1237 SCP (J1850) Invalid or Missing Data for Memory Storage
U1238 SCP (J1850) Invalid or Missing Data for Experimental #4
U1239 SCP (J1850) Invalid or Missing Data for Experimental #4
U1240 SCP (J1850) Invalid or Missing Data for Primary Id
U1241 SCP (J1850) Invalid or Missing Data for Primary Id
U1242 SCP (J1850) Invalid or Missing Data for Exterior Environment
U1243 SCP (J1850) Invalid or Missing Data for Exterior Environment
U1244 SCP (J1850) Invalid or Missing Data for Interior Environment
U1245 SCP (J1850) Invalid or Missing Data for Interior Environment
U1246 SCP (J1850) Invalid or Missing Data for Primary Id
U1247 SCP (J1850) Invalid or Missing Data for Primary Id
U1248 SCP (J1850) Invalid or Missing Data for Time / Date
U1249 SCP (J1850) Invalid or Missing Data for Time / Date
U1250 SCP (J1850) Invalid or Missing Data for Vehicle Id (VIN)
U1251 SCP (J1850) Invalid or Missing Data for Vehicle Id (VIN)
U1252 SCP (J1850) Invalid or Missing Data for Class A Functions
U1253 SCP (J1850) Invalid or Missing Data for Class A Functions
U1254 SCP (J1850) Invalid or Missing Data for Network Control
U1255 SCP (J1850) Invalid or Missing Data for Network Control
U1260 SCP (J1850) Single-Ended (+) Circuit Failure
U1261 SCP (J1850) Single-Ended (-) Circuit Failure
U1262 SCP (J1850) Communication Bus Fault
U1308 SCP (J1850) Invalid or Missing Data for Function Read Engine Torque
U1313 CAN-LS Monitor Data Abnormal (Subaru)
U1341 SCP (J1850) Invalid or Missing Data for Function Read Vehicle Speed
U140A Implausible Right Front Wheel Speed Signal Received (Jeep)
U1412 Implausible Vehicle Speed Signal Received
U1417 Implausible Left Wheel Distance Signal (Dodge, Chrysler, Jeep)
U1418 Implausible Left Wheel Distance Signal Received (Chrysler, Dodge, Jeep)
U1430 SCP (J1850) Invalid or Missing Data for Function Read Fuel System
U1451 SCP (J1850) Invalid or Missing Data for Function Read Audible Warnings /Anti-Theft Module
U1600 Electronic key-immobilizer system fault (Fiat, Alpha Romeo, Audi, Nissan)
U1612 SCP (J1850) Lack of Acknowledgment for Primary Id
U1736 SCP (J1850) Lack of Acknowledgment for Telltales
U1750 SCP (J1850) Lack of Acknowledgment for Audible Warnings
U1794 SCP (J1850) Lack of Acknowledgment for Mirrors
U1797 SCP (J1850) Lack of Acknowledgment for Door Locks
U1798 SCP (J1850) Lack of Acknowledgment for External Access (Doors)
U1806 SCP (J1850) Lack of Acknowledgment for Primary Id
U1900 CAN Communication Bus Fault
U1950 UPB Communication Bus Fault
U2000 – U3000 (Manufacturer defined, common definition listed)
U2000 Audio Rear Control Unit is Not Responding
U2001 Audio Tape Deck Unit is Not Responding
U2002 Audio Bezel is Not Responding
U2003 The Audio Compact Disk / Disk Jockey Unit is Not Responding
U2004 Audio Steering Wheel Control Unit is Not Responding
U2005 The audio Rear Integrated Control Panel Unit is Not Responding
U2006 Audio Remote Climate Control Unit is Not Responding
U2007 The audio Navigation Unit is Not Responding
U2008 The audio Phone is Not Responding
U2009 The audio Front Control Module (ACM) is Not Responding
U2010 The module is Not Responding (Non-SCP)
U2011 Module Transmitted Invalid Data (Non-SCP)
U2012 Communication Bus Error (Non-SCP)
U2013 The compass Module is not Responding
U2014 The audio Subwoofer Unit is Not Responding
U2015 Signal Link Fault (Non-SCP)
U2016 Signal Link Short to Ground (Non-SCP) / From NGV Module
U2017 Driver Side Crash Sensor Communication Fault (Non-SCP)
U2018 Passenger Side Crash Sensor Communication Fault (Non-SCP)
U2019 Audio Voice Module Not Responding
U2020 Audio Center Amp is not responding
U2021 Invalid /fault data received (Non-SCP)
U20BB Communication Loss with TCM
U2150 SCP (J1850) Invalid Data from REM
U2152 SCP (J1850) Invalid Data from GEM
U2160 SCP (J1850) Invalid Data from IC
U2195 SCP (J1850) Invalid Data from SCLM
U2500 (CAN) Lack of Acknowledgement From Engine Management
U2510 Received Data Does Not Match (Ford)
U3000 – U4000 (Control module/ Power distribution)
U3000 Control Module
U3001 Control Module Improper Shutdown
U3002 Vehicle Identification Number
U3003 Battery Voltage
U3004 Accessory Power Relay
U3005 Retained Accessory Power
U3006 Control Module Input Power “A”
U3007 Control Module Input Power “B”
U3008 Control Module Ground “A”
U3009 Control Module Ground “B”
U300A Ignition Switch
U300B Ignition Input Accessory/On/Start
U300C Ignition Input Off/On/Start
U300D Ignition Input On/Start
U300E Ignition Input On
U300F Ignition Input Accessory
U3010 Ignition Input Start
U3011 Ignition Input Off
U3012 ISO/SAE Reserved
U3100 ISO/SAE Reserved
U3F00 ISO/SAE Reserved
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Once the OBD-II scanner has provided any of the above U Error codes, input the 5 keywords into Google search to see corresponding fixes.

Also, you can check your car manufacturer’s website for solutions since some of the codes are manufacturer specific.

We’ll do well to discuss fixing some of these U Error Codes on our Error code pages, check it out.

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Meet Victor Lukasso, the owner of V. Auto Basics. Through this blog, Victor Provides Insights on the latest tips, maintenance, repair, and techniques in the automotive world.

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