Mercedes Atego FR unit Fault Codes
The FR unit in your Mercedes Atego is responsible for controlling various functions of the vehicle, including the engine, gearbox, and brakes. If the FR unit is showing fault codes, it means there’s an issue with one of these systems. Decoding these codes is essential for diagnosing and repairing the issue.
Mercedes Atego FR unit fault codes are typically displayed as a series of digits or letters on the FR unit display. These codes can be read using a diagnostic tool, which is commonly available at auto parts stores or can be purchased online. Once you’ve obtained the code, you can use our guide to decode it and determine the issue with your vehicle.
Our guide provides a comprehensive list of Mercedes Atego FR unit fault codes, along with their meanings and potential causes. Some of the most common fault codes include issues with the engine control unit, transmission control unit, and ABS system.
It’s important to note that while fault codes can help diagnose issues with your Mercedes Atego, they’re not always 100% accurate. Sometimes, multiple codes may be triggered at once, or a code may be triggered due to a faulty sensor rather than an actual issue with the component. If you’re unsure about the issue with your Mercedes Atego, it’s always best to consult with a professional mechanic.
In conclusion, decoding Mercedes Atego FR unit fault codes is essential for any Mercedes Atego owner. With our guide, you can decode the codes and troubleshoot the issue with your vehicle, saving you time and money on repairs.
| ERROR CODES | EXAPTATION |
|---|---|
| 0110 | CAN message from the anti-lock braking system ABS control unit is missing or incorrect. |
| 0111 | The value measured by the GS control unit is unreliable. |
| 0112 | CAN message from the control unit is missing or incorrect. |
| 0113 | CAN message from the control unit RS retarder control is missing or incorrect. |
| 0114 | CAN message from the instrument cluster INS control unit is missing or incorrect. |
| 0115 | CAN message from the PSM control unit of the parameterized special module is missing or incorrect. |
| 0117 | The value measured by the torque converter clutch control unit WSK is unreliable. |
| 0119 | The value measured by the KWS control unit is unreliable. |
| 0180 | The value measured by the ART control unit is unreliable. |
| 0201 | Engine CAN to the MR control unit in single-wire operation mode |
| 0202 | CAN message from the MR control unit is missing or incorrect. |
| 0203 | Engine CAN to MR control unit: open circuit |
| 0306 | Engine CAN to FLA system: open circuit |
| 0416 | The High-Speed-CAN bus has failed for more than 100 m / s. |
| 0418 | The High-Speed-CAN bus has failed. |
| 0501 | GB CAN bus in single-wire mode |
| 0508 | GB CAN bus does not output data. |
| 0584 | ‘KR’ function limitation |
| 0681 | Automatic gear selection system failed |
| 0682 | Automatic gear selection system in emergency mode |
| 0783 | Error while requesting data |
| 1120 | Connector ‘D+’ has a short to positive. |
| 1125 | The ‘D +’ connector on pin X4 18/13 is unreliable or has an open circuit or a short to ground. |
| 1223 | Clutch pedal switch 1 on pin X1 18/1 has an open circuit or is misaligned. |
| 1421 | The brake light switch has an open circuit or is incorrectly adjusted. |
| 1423 | The brake light switch on contact X118 / 11 has a short circuit. |
| 1523 | The tempomat-temposet switch is faulty. |
| 1524 | The tempomat-temposet switch is faulty. |
| 1526 | Input ‘Quit’ tempomat switch is open. |
| 1623 | Clutch pedal sensor 1 and 2: incorrect adjustment or sensor stuck |
| 1723 | The neutral position switch on contact X418 / 16 is defective or stuck. |
| 1923 | The divider switch on contacts X2 18/11 and X2 18/12 has an open circuit or is erroneous. |
| 2023 | Faulty engine brake switch of the engagement lever ‘Engine / retarder control’ |
| 2120 | Output X1 18/13 has a short to positive. |
| 2122 | Output X1 18/13 has a short to ground. |
| 2520 | Switch block 1/4 has a short to positive. |
| 2522 | Switch block 1/4 has a short to ground. |
| 2620 | Switch block 2/3 has a short to positive. |
| 2622 | Switch block 2/3 has a short to ground. |
| 2720 | The oil level sensor in the automatic refueling of engine oil M2 has a short to positive. |
| 2823 | Dual ART key control |
| 2923 | Shift lever module implausible |
| 2927 | GS sensor unit pinched. |
| 2928 | The GS sensor unit is defective. |
| 2929 | The ‘Auto/Manual’ key of the GS sensor block is stuck. |
| 3021 | Terminal 30 is open. |
| 3031 | Terminal 30: high voltage |
| 3032 | Terminal 30: low voltage |
| 3130 | The coolant level sensor XZ 15/11 or the air filter control sensor XZ 15/1 is faulty, the power supply XZ 15/13 has an open circuit or a short to positive or ground. |
| 3233 | The air filter control sensor is faulty. |
| 3236 | The air filter contamination limit has been reached. |
| 3330 | The outdoor temperature sensor has an open circuit / short to positive / ground |
| 3430 | The clutch stroke sensor has an open circuit, a short to ground or a short to positive. |
| 3533 | Faulty coolant level sensor. |
| 3634 | Reached max, wear of the friction linings of the clutch. |
| 3635 | Clutch displacement sensor out of range |
| 4141 | Signal ‘KGT input RPM invalid. |
| 4145 | Gearbox input speed sensor: open circuit / short to positive / ground |
| 4341 | Invalid speed signal (V) |
| 4345 | The speed signal has an open circuit or short to ground or positive. |
| 4440 | The first branch of the gas pedal sensor has an open circuit or a short to ground or positive. |
| 4540 | The second branch of the gas pedal sensor has an open circuit or a short to ground or positive. |
| 4641 | Faulty gas pedal sensor |
| 4642 | The gas pedal sensor does not reach the idle stop. |
| 4643 | The value of the gas pedal sensor is out of the parameterized range |
| 4644 | The gas pedal sensor is tight |
| 5052 | The solenoid valve 1 on the XZ 15/4 contact has a short to ground. |
| 5053 | Solenoid valve 1 on contact XZ 15/4 has a short to positive. |
| 5054 | Solenoid valve 1 on contact XZ 15/4 has an open circuit. |
| 5152 | Solenoid valve 2 on contact XZ 15/7 has a short to ground. |
| 5153 | Solenoid valve 2 on contact XZ 15/7 has a short to positive. |
| 5154 | Solenoid valve 2 on contact HZ 15/7 has an open circuit. |
| 5252 | The common ground wire of the constant throttle solenoid valve and retarder has a short to ground. |
| 5253 | The common ground wire of the constant throttle solenoid valve and retarder has a short to positive. |
| 5352 | Solenoid valve ‘Split 1’ has a short to ground. |
| 5353 | Solenoid valve ‘Split 1’ has a short to positive. |
| 5354 | The ‘Split 1’ solenoid valve has an open circuit. |
| 5452 | Solenoid valve ‘Split 2’ has a short to ground. |
| 5453 | Solenoid valve ‘Split 2’ has a short to positive. |
| 5454 | ‘Split 2’ solenoid valve has an open circuit. |
| 5552 | The common ground wire of the solenoid valves Y29 and Y30 has a short to ground. |
| 5553 | The common ground wire of the solenoid valves Y29 and Y30 has a short to positive. |
| 5652 | The brake light control signal output has a short to ground. |
| 5653 | The brake light control output has a short to positive. |
| 5654 | The output ‘Activation of the brake light’ has an open circuit. |
| 5752 | The output “Control of the reversing lights” has a short to ground. |
| 5753 | The “Reversing Light Control” output has a short to positive. |
| 5754 | The output “Control of the reversing lights” has an open circuit. |
| 5852 | The output “Activation D +” has a short to ground. |
| 5853 | The output “Activation D +” has a short to positive. |
| 5854 | The output “Activation D +” has an open circuit. |
| 5952 | Activation of automatic refueling of engine oil has a short to ground. |
| 5953 | Activation of automatic refueling of engine oil has a short to positive. |
| 5954 | The activation of automatic refueling of engine oil has an open circuit. |
| 6262 | Internal error in the control unit. |
| 6265 | Internal error in the control unit. |
| 6365 | Internal error in the control unit. |
| 7064 | Internal error in the control unit. |
| 7070 | The gas pedal unit is not trained |
| 7071 | Initialization (learning) error of the gear ratio of the divider |
| 7072 | Initialization (learning) error of the gear ratio of terminal W |
| 7073 | Learning error of the clutch displacement sensor |
| 7074 | Initialization (learning) error on the CAN bus |
| 8023 | Switch position HL5 implausible |