Mercedes-Benz Maintenance System Fault Codes List
WS fault codes in Mercedes-Benz vehicles detect if there are any malfunctions related to the maintenance system. Usually, these issues are related to the internal fault in the control unit, temperature sensor, brake pad wear or oil temperature in the engine.
Fault codes
| Code | Description |
|---|---|
| 122 | Can Bus Overload |
| 123 | Functional Can Bus Failure |
| 132 | Data Ws Control Unit Lifecycle Wrong. |
| 133 | Ws Control Unit Parameters Are Incorrect. |
| 135 | Internal Fault In The Control Unit |
| 138 | Internal Fault In The Control Unit |
| 139 | Internal Fault In The Control Unit |
| 150 | Timeout Receiving Can Bu Abs Data |
| 151 | Can Reception Wait Time Data Bu Gs |
| 152 | Can Reception Wait Time Data Bu Fr |
| 153 | Can Reception Wait Time Data Bu Mr |
| 154 | Can Reception Wait Time Data Bu Rs |
| 155 | Can Reception Wait Time Data Bu Fr |
| 156 | Can Reception Wait Time Data Bu Mr |
| 157 | Timeout Receiving Can Data Bu Ins |
| 158 | Timeout Receiving Can Data Bu Bs |
| 159 | Can Reception Wait Time Data Bu Gs |
| 201 | Oil Temperature Sensor Has A Fault Kp "Short To Ground". |
| 202 | Exceeded Temperature Sensor Measuring Range Gearbox Oil. |
| 205 | The Measured Value Of The Oil Temperature Sensor Kp Unreliable. |
| 210 | Exceeded The Maximum Allowable Temperature Of The Oil Kp. |
| 301 | The Temperature Sensor Transfer Box Has A Fault "Short Circuit To Ground." |
| 302 | Exceeded Temperature Sensor Measuring Range Transfer Case. |
| 305 | The Measured Value Transfer Gearbox Temperature Sensor Is Uncertain. |
| 310 | Exceeded The Maximum Allowable Temperature Of The Oil Transfer Case. |
| 401 | Temperature Sensor Front Axle Has A Fault "Short Circuit To Ground." |
| 402 | Exceeded Range Of Front Axle Temperature Sensor Measurements. |
| 405 | The Measured Value Of The Front Axle Unreliable Temperature Sensor. |
| 410 | Exceeded The Maximum Allowable Temperature Of The Oil Front Differential. |
| 501 | Rear Axle Temperature Sensor Has A Fault "Short Circuit To Ground." |
| 502 | Exceeded The Range Of The Rear Axle Temperature Sensor Measurements. |
| 505 | The Measured Value Of The Rear Axle Unreliable Temperature Sensor. |
| 510 | Exceeded The Maximum Allowable Temperature Of The Rear Differential Oil. |
| 601 | Condensed Liquid Sensor Has A Fault "Short Circuit" On The Ground. |
| 604 | Condensed Liquid Sensor Has A Fault "Break A Circuit." |
| 605 | Value Not Valid Condensation Sensor. |
| 1011 | Too Much Difference Between The Brake Pad Wear Brakes 1St Front Axle. |
| 1012 | Too Much Difference Between The Brake Pad Wear First Front Axle And The Other Axles. |
| 1111 | Too Much Difference Between The Brake Pad Wear Brakes 2Nd Front Axle. |
| 1112 | Too Much Difference Between The Brake Pad Wear Second Front Axle And The Other Axles. |
| 1211 | Too Much Difference Between The Brake Pad Wear Brakes 1St Rear Axle. |
| 1212 | Too Much Difference Between The Brake Pad Wear First Rear Axle And The Other Axles. |
| 1311 | Too Much Difference Between The Brake Pad Wear Brakes 2Nd Rear Axle. |
| 1312 | Too Much Difference Between The Brake Pad Wear Second Rear Bridge And Other Bridges. |
| 1401 | The Closure Of The Signal Line Of The Left Sensor Brake Pad Wear 1St Front Axle. |
| 1402 | The Measured Value Of Brake Pad Wear 1St Front Axle On The Left Above The Measuring Range. |
| 1403 | The Measured Value Of Brake Pad Wear 1St Front Axle On The Left Below The Measurement Range. |
| 1404 | Broken Signal Wire Left Sensor Brake Pad Wear 1St Front Axle. |
| 1405 | Invalid Measurement Value Of Brake Pad Wear 1St Front Axle On The Left. |
| 1420 | Failure Of The Can Signal Brake Pad Wear 1, Front Axle Left |
| 1501 | The Closure Of The Signal Line Of The Right Sensor Brake Pad Wear 1St Front Axle. |
| 1502 | The Measured Value Of Brake Pad Wear 1St Front Axle On The Right Above The Measuring Range. |
| 1503 | The Measured Value Of Brake Pad Wear 1St Front Axle On The Right Below The Measurement Range. |
| 1504 | Open The Right Signal Wire Sensor Brake Pad Wear 1St Front Axle. |
| 1505 | Invalid Measurement Value Of Brake Pad Wear 1St Front Axle On The Right. |
| 1520 | Failure Of The Can Signal Brake Pad Wear 1, Front Axle Right |
| Code | Description |
|---|---|
| 1601 | The Closure Of The Signal Line Of The Left Sensor Brake Pad Wear 2Nd Front Axle. |
| 1602 | The Measured Value Of Brake Pad Wear Of The 2Nd Front Axle On The Left Above The Measuring Range. |
| 1603 | The Measured Value Of Brake Pad Wear Of The 2Nd Front Axle On The Left Below The Measurement Range. |
| 1604 | Broken Signal Wire Left Sensor Brake Pad Wear 2Nd Front Axle. |
| 1605 | Invalid Measurement Value Of Brake Pad Wear Of The 2Nd Front Axle On The Left. |
| 1620 | Failure Of The Can Signal Brake Pad Wear 2Nd Front Axle Left |
| 1701 | The Closure Of The Signal Line Of The Right Brake Pad Wear Indicator 2Nd Front Axle. |
| 1702 | The Measured Value Of Brake Pad Wear Of The 2Nd Front Axle On The Right Above The Measuring Range. |
| 1703 | The Measured Value Of Brake Pad Wear Of The 2Nd Front Axle On The Right Below The Measurement Range. |
| 1704 | Broken Signal Wire Of The Right Brake Pad Wear Indicator 2Nd Front Axle. |
| 1705 | Invalid Measurement Value Of Brake Pad Wear Of The 2Nd Front Axle On The Right. |
| 1720 | Failure Of The Can Signal Brake Pad Wear 2Nd Front Axle Right |
| 1801 | The Closure Of The Signal Line Of The Left Sensor Brake Pad Wear 1 St Rear Axle. |
| 1802 | The Measured Value Of Brake Pad Wear 1St Rear Axle On The Left Above The Measuring Range. |
| 1803 | The Measured Value Of Brake Pad Wear 1St Rear Axle On The Left Below The Measurement Range. |
| 1804 | Broken Signal Wire Left Sensor Brake Pad Wear 1 St Rear Axle. |
| 1805 | Invalid Measurement Value Of Brake Pad Wear 1St Rear Axle Left. |
| 1820 | Failure Of The Can Brake Pad Wear 1 St Rear Axle To The Left Signal |
| 1901 | The Closure Of The Signal Line Of The Right Sensor Brake Pad Wear 1 St Rear Axle. |
| 1902 | The Measured Value Of Brake Pad Wear 1St Rear Axle On The Right Above The Measuring Range. |
| 1903 | The Measured Value Of Brake Pad Wear 1St Rear Axle On The Right Below The Measurement Range. |
| 1904 | Open The Right Signal Wire Sensor Brake Pad Wear 1 St Rear Axle. |
| 1905 | Invalid Measurement Value Of Brake Pad Wear 1St Rear Axle Right. |
| 1920 | Failure Of The Can Brake Pad Wear 1 St Rear Axle Right Signal |
| 2001 | The Closure Of The Signal Line Of The Left Sensor Brake Pad Wear 2Nd Rear Axle. |
| 2002 | The Measured Value Of Brake Pad Wear 2Nd Rear Axle On The Left Above The Measuring Range. |
| 2003 | The Measured Value Of Brake Pad Wear 2Nd Rear Axle On The Left Below The Measurement Range. |
| 2004 | Broken Signal Wire Left Sensor Brake Pad Wear 2Nd Rear Axle. |
| 2005 | Invalid Measurement Value Of Brake Pad Wear 2Nd Rear Axle Left. |
| 2020 | Failure Of The Can Signal Brake Pad Wear 2Nd Rear Axle Left |
| 2101 | The Closure Of The Signal Line Of The Right Sensor Brake Pad Wear 2Nd Rear Axle. |
| 2102 | The Measured Value Of Brake Pad Wear 2Nd Rear Axle On The Right Above The Measuring Range. |
| 2103 | The Measured Value Of Brake Pad Wear 2Nd Rear Axle On The Right Below The Measurement Range. |
| 2104 | Open The Right Signal Wire Sensor Brake Pad Wear 2Nd Rear Axle. |
| 2105 | Invalid Measurement Value Of Brake Pad Wear 2Nd Rear Axle Right. |
| 2120 | Failure Of The Can Signal Brake Pad Wear 2Nd Rear Axle Right |
| 2205 | Invalid Measurement Value (Signal Path) Tachograph. |
| 2320 | Failure Of The Can Signal 'Residual Pressure Circuit 1 Or 2' (Ins) |
| 3105 | Not Actual Speed Signal Nw. |
| 3120 | Failure Of Nw Speed Via Can Signal |
| 3220 | Failure Of The Can Speed Signal |
| 3320 | Failure Of The Setpoint Signal Via The Can Motor Torque |
| 3420 | Failure Of The Can Signal Measured Value Outside Air Temperature |
| 3520 | Failure Of The Can Signal Measured Value Air Filter Is Clogged |
| 4105 | Invalid Measurement Of Oil Temperature In The Retarder Brake (Retarder). |
| 4110 | Exceeded The Maximum Allowable Temperature Of The Oil In The Retarder Brake (Retarder). |
| 4120 | Failure Of The Can Signal Is The Measured Value Of Oil Temperature In The Retarder Brake (Retarder) |
| 5105 | Invalid Measurement Value Of The Oil Temperature In The Engine. |
| 5110 | Exceeded The Maximum Allowable Temperature Of The Oil In The Engine. |
| 5113 | Improper Engine Oil Viscosity. |
| 5120 | Failure Of The Can Signal Is The Measured Value Of Oil Temperature In The Engine |
| 5205 | Invalid Measurement Value Of The Coolant Temperature. |
| 5210 | Exceeded The Maximum Permissible Coolant Temperature. |
| 5220 | Failure Of The Can Signal Of The Measured Value Of The Coolant Temperature |
| 5320 | Failure Of The Can Signal Measured Fuel Consumption Values |
| 7120 | Failure Of The Can Actual Value Of The Clutch Signal |
Fault codes categories
Gear Shift Fault Codes List
Gear Shift (GS) code will immediately identify if there are any malfunctions related to the gear shit functioning.
Learn more
Engine Control Fault Codes
MR codes will help you identify engine-related malfunctions – usually, they are closely related to the vehicle’s speed, pressure, breaking or oil pressure.
Learn more
Maintenance System Fault Codes
WS codes will help you identify maintenance system malfunctions – usually these are related to internal, temperature sensors, brake pads or oil temperature faults.
Learn more
Automatic Transmission Programming Fault Codes
ATP codes will help you identify any malfunctions related to the gearbox and indirectly indicate other malfunctions connected to the vehicle transmission.
Learn more