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 |
|---|---|---|---|
| U300046 | Control Module | 1 | Network |
| U300047 | The control unit has a malfunction due to redundant monitoring. There is a runtime error. | 2 | Network |
| U300049 | The control unit has a malfunction due to redundant monitoring. There is an internal electrical fault. | 3 | Network |
| U300062 | The control unit has a malfunction due to redundant monitoring. The signal comparison is faulty. | 1 | Network |
| U300064 | The control unit has a malfunction due to redundant monitoring. There is an implausible signal. | 1 | Network |
| U300081 | Control Module | 1 | Network |
| U300082 | The control unit has a malfunction due to redundant monitoring. The instruction counter is not updated. | 1 | Network |
| U300087 | The control unit has a malfunction due to redundant monitoring. The message is missing. | 1 | Network |
| U30008C | The control unit has a malfunction due to redundant monitoring. | 1 | Network |
| U3000A2 | The control unit has a malfunction due to redundant monitoring. The system voltage is too low. | 1 | Network |
| U3000A3 | The control unit has a malfunction due to redundant monitoring. The system voltage is too high. | 1 | Network |
| U3001 | Control Module Improper Shutdown Performance | 28 | Network |
| U300100 | Radar Sensor CAT1 Reset | 2 | Network |
| U300101 | Control Module Improper Shutdown Performance | 1 | Network |
| U300104 | Monitoring level 2 reset 1 | 1 | Network |
| U30011C | The control unit was switched off improperly. The voltage value is outside the permissible range. | 1 | Network |
| U30011D | The control unit was switched off improperly. The current value is outside the permissible range. | 1 | Network |
| U300144 | The control unit was switched off improperly. There is an error in the data memory. | 1 | Network |
| U300146 | The control unit was switched off improperly. There is an error in the calibration or parameterization memory. | 1 | Network |
| U300147 | Das Steuergerät wurde unsachgemäß ausgeschaltet. Es liegt ein Laufzeitfehler vor. | 1 | Network |
| U300196 | The control unit was switched off improperly. There is an internal component fault. | 1 | Network |
| U3001FA | Control Module Improper Shutdown Performance | 1 | Network |
| U3001FC | Control Module Improper Shutdown Performance. FC | 1 | Network |
| U3001FE | ECU AURIX Core 2 internal appl watchdog event | 1 | Network |
| U300200 | The current vehicle identification number is incorrect or not present. | 1 | Network |
| U300300 | SPT stopped by external reason (Safety) | 1 | Network |
| U3006 | Control Module Input Power A Circuit/Open | 27 | Network |
| U300612 | Control Module Input Power 'A' Circuit/Open Circuit Short To Battery | 1 | Network |
| U3008 | Control Module Ground A | 26 | Network |
| U3009 | Control Module Ground B | 25 | Network |
| U300A06 | SSC: Electronic ignition switch (EIS)-ECU (Standstill coordinator coding not correct): DTC_SSCEISConfUnlikeESP | 1 | Network |
| U300A09 | SSC: Electronic ignition switch (EIS)-ECU parking mode fault: DTC_SSCEISFailure | 1 | Network |
| U300A82 | Ignition Switch | 1 | Network |
| U300A83 | Ignition Switch | 1 | Network |
| U300E | Ignition Input On | 23 | Network |
| U300E00 | Ignition Input On | 1 | Network |
| U300E01 | Ignition Input On | 1 | Network |
| U300F | Ignition Input Accessory | 22 | Network |
| U3011 | Ignition Input Off | 23 | Network |
| U301100 | Input signal 'Circuit 15 OFF' is implausible. | 1 | Network |
| U301200 | Control Module Improper Wake-up Performance | 1 | Network |
| U301201 | Control Module Improper Wake-up Performance. General Electrical Failure | 1 | Network |
| U301254 | Control Module Improper Wake-up Performance. Calibration is missing. | 1 | Network |
| U3015 | Control Module Ground C | 6 | Network |
| U3017 | Control Module Timer/Clock Performance | 13 | Network |
| U301700 | Control Module Timer/Clock Performance | 1 | Network |
| U301702 | Control Module Timer/Clock Performance General Signal Error | 1 | Network |
| U301704 | Control Module Timer/Clock Performance | 1 | Network |
| U301709 | The real-time internal control unit clock has a malfunction. Component Failure. Fault detected in mP clock frequency | 1 | Network |
| U3017E0 | The real-time internal control unit clock has a malfunction. PLL clock deviations | 1 | Network |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.