Mercedes-Benz fault codes
20,291 codes · 1,724 vehicle records · 258 ECU records · 56,350 live-data parameters
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Codes 20,291
| Code | Description | Brands | System |
|---|---|---|---|
| U112083 | SecOC calculation incorrect (IT-Security) | 1 | Network |
| U112087 | The security module of the control unit has detected a communication error. | 1 | Network |
| U112088 | Time sync message missing. | 1 | Network |
| U1120E0 | Ethernet Inter Processor Communication Containers are dropped on uC | 1 | Network |
| U1120E1 | Ethernet Inter Processor Communication Containers are dropped on uP | 1 | Network |
| U1120E8 | uP is not booting correctly. | 1 | Network |
| U1120E9 | uP Software unexepcted software behaviour. | 1 | Network |
| U1120EB | The security module of the control unit has detected a communication error. Software lockstep security error dectected on master | 1 | Network |
| U1120FA | Communication with control unit FAA has a malfunction | 1 | Network |
| U1120FB | Implausible object data were received from FAA status | 1 | Network |
| U1120FC | Communication with control unit HWA has a malfunction. | 1 | Network |
| U1121 | Communication failure with electric steering ECU | 29 | Network |
| U1122 | Data bus implausible message | 26 | Network |
| U112256 | Communication with one or more color generation and coupling modules on LIN bus 1 has a malfunction. An incorrect or incompatible configuration was detected. | 1 | Network |
| U112295 | Communication with one or more color generation and coupling modules on LIN bus 1 has a malfunction. The mechanical setup is not OK. | 1 | Network |
| U1123 | Lost communication with LIN ECU 3 | 26 | Network |
| U112356 | Die Kommunikation mit einem oder mehreren Farberzeug- und Einkoppelmodulen auf LIN-Bus 2 hat Funktionsstörung. Eine falsche oder inkompatible Konfiguration wurde erkannt. | 1 | Network |
| U112395 | Communication with one or more color generation and coupling modules on LIN bus 2 has a malfunction. The mechanical setup is not OK. | 1 | Network |
| U1124 | SAS (CAN message) | 26 | Network |
| U1125 | Yaw rate sensor signal fault | 25 | Network |
| U1126 | EPS (CAN message) | 23 | Network |
| U1127 | 4WD (CAN message) | 22 | Network |
| U1128 | Meter (CAN message) | 24 | Network |
| U1129 | ETACS (CAN message) | 21 | Network |
| U112A00 | Communication with the electric additional compressor has a malfunction. | 1 | Network |
| U112A87 | Communication with the electric additional compressor has a malfunction. The message is missing. | 1 | Network |
| U112F87 | Die Kommunikation mit dem Trsteuergerät hat Funktionsstörung. | 1 | Network |
| U1130 | CAN network | 20 | Network |
| U1131 | Display (CAN message) | 21 | Network |
| U1132 | SRS airbag (CAN message) | 17 | Network |
| U1133 | LIN network | 23 | Network |
| U1135 | Valid except code 200 | 20 | Network |
| U1136 | KOS (CAN message) | 22 | Network |
| U1137 | Invalid or missing data for telltales | 15 | Network |
| U1138 | 4WD CAN timeout | 16 | Network |
| U1139 | Communication error (invalid) | 13 | Network |
| U113A | No description available | 4 | Network |
| U113B00 | Die Kommunikation mit dem DIRECT SELECT-Wahlhebel hat Funktionsstörung. | 1 | Network |
| U113C00 | Die Raddrehzahlsignale wurden nicht empfangen. | 1 | Network |
| U113D00 | External access to the LIN bus failed due to missing authentication. | 1 | Network |
| U113D01 | TGS not initialized | 1 | Network |
| U113D02 | External access via the LIN bus has failed due to missing authentication. There is a general signal fault. | 1 | Network |
| U113D03 | BSW Watchdog (Wdg) has detectet an Error | 1 | Network |
| U113D04 | BSW Serial Peripheral Interface (Spi) has detectet an Error | 1 | Network |
| U113D05 | BSW ECU Reset Monitoring detected a unexpected ECU Reset | 1 | Network |
| U113D06 | BSW Non Volatile Memory (NvM) has detectet the Error INTEGRITY FAILED | 1 | Network |
| U113D07 | BSW Non Volatile Memory (NvM) has detectet the Error REQ FAILED | 1 | Network |
| U113D81 | External access via the LIN bus has failed due to missing authentication. Incorrect data were received. | 1 | Network |
| U113E00 | Communication with the battery sensor has a malfunction. | 1 | Network |
| U113E87 | Communication with the battery sensor has a malfunction. Missing Message | 1 | Network |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.