Mercedes-Benz Truck Error Codes

Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, Mercedes-Benz Truck Error Codes, plus they are familiar with equipment from a variety of manufacturers.

The first Mercedes-Benz truck range, presented at the 1926 Berlin Motor Show (October) and at the 1927 International Motor Show for Trucks and Special Vehicles in Cologne (May) included three basic models with the payloads of 1.5, 2.5 and 5 tons. Each model was available with a standard and a low-frame chassis. Low chassis made sense especially that time to make easier loading and unloading of the vehicle. Also the low chassis has been used to build the buses. The models with the standard chassis were L1, L2 and L5 (L stood for Lastwagen, German word for a truck, and the digit stood for the rated payload in tons).

The models with the low chassis were N1, N2 and NJ5/N5 (N stood for Niederwagen, German word means a low car). The trucks were equipped with the 4 cylinders petrol engines (M14, M2 and M5), developing 45HP, 55HP and 70 HP. Mercedes-Benz L1 and L2 were the new models, but Mercedes-Benz L5 truck was basically a continuation of famous Benz 5CN truck, which was developed before the merge of Benz & Cie and Daimler-Motoren-Gesellschaft companies.

Mercedes-Benz List of fault codes for auxiliary heater control unit (ZHE)

0000 Faulty control unit
0001 Control unit malfunction, internal temperature sensor
0100 Auxiliary heater does not start.
0103 The ignition energy of the glow plug is too low
0104 Lock after unsuccessful start
0200 The flame has faded again.
0301 Overvoltage
0302 Undervoltage
0400 premature flame detection
0501 Short circuit of the flame sensor
0502 Open flame sensor
0503 Overheating of the flame sensor
0601 Short circuit temperature sensor
0602 Open temperature sensor
0701 Shorting the metering pump
0702 Open metering pump
0705 The metering pump has a short to positive.
0801 Short circuit of the fan motor
0802 Open fan motor
0803 Incorrect fan motor speed
0805 The electric fan motor has a short to positive.
0901 Closing the glow plug
0902 Open glow plug
0905 The glow plug has a short to positive.
1000 Overheating of additional heater
1003 Overheating
1004 Lockout after overheating
1201 Short circuit of the setpoint sensor
1202 Break of the setpoint sensor
1301 Short circuit overheating sensor
1302 Open overheating sensor
1303 Overheating sensor out of tolerance.
1501 Short to external components
1601 Short in the external fan relay connection.
1602 An open in the connection of the external fan relay.
1801 Wire K has a short circuit.

Mercedes-Benz MALFUNCTION CODE LIST OF THAT SYSTEM Control Block (WS)

0122 CAN bus overload
0123 CAN data bus functional failure
0132 The life data of the WS control unit is incorrect.
0133 The parameters of the WS control unit are incorrect.
0135 Internal error in the control unit
0138 Internal error in the control unit
0139 Internal error in the control unit
0150 Waiting time for receiving CAN data ABS control unit
0151 Waiting time for receiving CAN data BU GS
0152 Waiting time for receiving CAN data BU FR
0153 Waiting time for receiving CAN data control unit MR
0154 Waiting time for receiving CAN data of control unit RS
0155 Waiting time for receiving CAN data BU FR
0156 Waiting time for receiving CAN data control unit MR
0157 Waiting time for receiving CAN data BU INS
0158 Waiting time for CAN data reception BS BS
0159 Waiting time for receiving CAN data BU GS
0201 The gearbox oil temperature sensor has a “Short to Ground” fault.
0202 Measurement range of gearbox oil temperature sensor exceeded.
0205 The measured value of the gearbox oil temperature sensor is not reliable.
0210 Maximum permissible gearbox oil temperature exceeded.
0301 Transfer case temperature sensor has a fault “Short circuit to ground”.
0302 Measurement range of the transfer case temperature sensor exceeded.
0305 The measured value of the transfer case temperature sensor is not reliable.
0310 The maximum permissible transfer case oil temperature has been exceeded.
0401 The temperature sensor of the front axle has a fault “Short circuit to ground”.
0402 Measurement range of the front axle temperature sensor exceeded.
0405 The measured value of the front axle temperature sensor is not reliable.
0410 The maximum permissible oil temperature of the front axle gearbox has been exceeded.
0501 The temperature sensor of the rear axle has a fault “Short circuit to ground”.
0502 Measurement range of the rear axle temperature sensor exceeded.
0505 The measured value of the rear axle temperature sensor is not reliable.
0510 The maximum permissible oil temperature of the rear axle gearbox has been exceeded.
0601 Condensed liquid sensor has a “Short circuit” fault to ground.
0604 The condensed liquid sensor has a “Circuit Open” fault.
0605 Invalid measured value of the condensate sensor.
1011 Brake pad wear difference too large between the brakes of the 1st front axle.
1012 Too much difference between brake pad wear between the 1st front axle and other axles.
1111 Too much difference in brake pad wear between the brakes of the 2nd front axle.
1112 Too much difference between brake pad wear between the 2nd front axle and other axles.
1211 Too much difference in brake pad wear between the brakes of the 1st rear axle.
1212 Too much difference in brake pad wear between the 1st rear axle and other axles.
1311 Too much difference between brake pad wear between the brakes of the 2nd rear axle.
1312 Too much difference between brake pad wear between the 2nd rear axle and other axles.
1401 Shorting the signal wire of the left brake pad wear sensor of the 1st front axle.
1402 The measured value of the wear of the brake pads of the 1st front axle on the left above the measuring range.
1403 The measured value of the wear of the brake pads of the 1st front axle on the left below the measuring range.
1404 Breakage of the signal wire of the left brake pad wear sensor of the 1st front axle.
1405 Invalid measured brake pad wear of the 1st front axle on the left.
1420 Failure of the signal for CAN wear of the brake pads of the 1st front axle on the left
1501 Shorting the signal wire of the right brake pad wear sensor of the 1st front axle.
1502 The measured brake pad wear of the 1st front axle is on the right above the measuring range.
1503 The measured value of the wear of the brake pads of the 1st front axle on the right below the measuring range.
1504 Break of a signal wire of the right brake pad wear sensor of the 1st front axle.
1505 Invalid measured brake pad wear of the 1st front axle on the right.
1520 Failure of the signal for CAN wear of the brake pads of the 1st front axle on the right
1601 Shorting the signal wire of the left brake pad wear sensor of the 2nd front axle.
1602 The measured brake pad wear of the 2nd front axle on the left is above the measuring range.
1603 The measured brake pad wear of the 2nd front axle on the left below the measuring range.
1604 Breakage of the signal wire of the left brake pad wear sensor of the 2nd front axle.
1605 Breakage of the signal wire of the left brake pad wear sensor of the 2nd front axle.
1620 Failure of the signal for CAN wear of the brake pads of the 2nd front axle on the left
1701 Shorting the signal wire of the right brake pad wear sensor of the 2nd front axle.
1702 The measured brake pad wear of the 2nd front axle is to the right above the measuring range.
1703 The measured brake pad wear of the 2nd front axle is to the right below the measuring range.
1704 Open signal wire of the right brake pad wear sensor of the 2nd front axle.
1705 Invalid measured brake pad wear of the 2nd front axle on the right.
1720 Failure of the signal for CAN wear of the brake pads of the 2nd front axle on the right
1801 Shorting the signal wire of the left brake pad wear sensor of the 1st rear axle.
1802 The measured brake pad wear of the 1st rear axle is on the left above the measuring range.
1803 The measured brake pad wear of the 1st rear axle is to the left below the measuring range.
1804 Broken signal wire of the left brake pad wear sensor of the 1st rear axle.
1805 Invalid measured brake pad wear on the 1st rear axle on the left.
1820 Failure of the signal for CAN wear of the brake pads of the 1st rear axle on the left
1901 Shorting the signal wire of the right brake pad wear sensor of the 1st rear axle.
1902 The measured brake pad wear of the 1st rear axle is on the right above the measuring range.
1903 Measured brake pad wear for the 1st rear axle on the right below the measuring range.
1904 Break in the signal wire of the right brake pad wear sensor of the 1st rear axle.
1905 Invalid measured brake pad wear on the 1st rear axle on the right.
1920 Failure of the signal for CAN wear of the brake pads of the 1st rear axle on the right
2001 Shorting the signal wire of the left brake pad wear sensor of the 2nd rear axle.
2002 The measured value of the brake pad wear on the 2nd rear axle is on the left above the measuring range.
2003 The measured value of the brake pad wear on the 2nd rear axle on the left below the measuring range.
2004 Broken signal wire of the left brake pad wear sensor of the 2nd rear axle.
2005 Invalid measured brake pad wear of the 2nd rear axle on the left.
2020 Failure of the signal for CAN wear of the brake pads of the 2nd rear axle on the left
2101 Shorting the signal wire of the right brake pad wear sensor of the 2nd rear axle.
2102 Measured brake pad wear on the 2nd rear axle on the right above the measuring range.
2103 Measured brake pad wear on the 2nd rear axle on the right below the measuring range.
2104 Break of a signal wire of the right brake pad wear sensor of the 2nd rear axle.
2105 Invalid measured brake pad wear of the 2nd rear axle on the right.
2120 Failure of the signal for CAN wear of the brake pads of the 2nd rear axle on the right
2205 Invalid measured value (path signal) of the tachograph.
2320 CAN signal failure Residual circuit pressure 1 or 2 ‘(INS)
3105 Invalid SZ speed signal.
3120 Failure of the SZ speed signal via CAN
3220 CAN speed signal failure
3320 Failure of the engine torque setpoint signal via CAN
3420 Failure of the signal on the CAN measured value of the outdoor temperature
3520 Failure of the signal on the CAN measured value air filter contamination
4105 Invalid measured oil temperature in the retarder.
4110 The maximum permissible oil temperature in the retarder has been exceeded.
4120 Failure of a CAN signal of the measured oil temperature in the retarder (retarder)
5105 Invalid measured engine oil temperature.
5110 The maximum permissible engine oil temperature has been exceeded.
5113 Incorrect viscosity of engine oil.
5120 CAN signal failure of the measured value of the engine oil temperature
5205 Invalid measured coolant temperature.
5210 Maximum permissible coolant temperature exceeded.
5220 Failure of a signal on CAN of the measured value of temperature of a cooling liquid
5320 CAN signal failure measured value fuel consumption
7120 CAN signal failure of the actual clutch value

Mercedes-Benz List of trouble codes for tachograph control unit (TCO)

0003 Tachograph voltage value is below the minimum allowable
0004 Power failure
0007 The tachograph voltage value is higher than the maximum allowable
0157 Internal error
0200 Driver card 1 has a malfunction.
0300 Driver card 2 has a malfunction.
0400 Card reader 1 is defective.
0500 Card reader 2 is defective.
0696 Printer paper is missing or the drawer is open.
0700 Printer malfunction
0800 Error of time and (or) date
1000 CAN bus fault
1100 CAN communication failed.
1249 Internal error
1351 Internal error
1364 Tachograph calibration is incorrect.
1500 keyboard malfunction
1648 Display defective or broken.
1700 CAN bus fault
1896 Movement without a valid tachograph card
3203 The voltage value of the speed sensor is below the minimum
3204 Speed sensor power failure
3207 The voltage value of the speed sensor is higher than the maximum
3300 There is no signal from the speed sensor.
3400 speed signal malfunction
3500 speed signal malfunction
3682 The security code for the speed sensor is invalid.
3708 Speed sensor is defective.
4800 Output B7 has a short circuit.
5000 Output B6 has a short circuit.
5100 Output B8 has a short circuit.

Mercedes-Benz List of fault codes control unit for passive safety system (SRS)

0100 Internal malfunction of the control unit
0105 Internal malfunction of the control unit
0201 A driver airbag malfunction has a Short Circuit malfunction.
0202 Airbag on the driver’s side has a malfunction “Open circuit”.
0203 The driver-side airbag has a Short Circuit fault to ground.
0204 Airbag on the driver’s side has a malfunction “Short circuit” to plus.
0205 The capacity of the driver airbag ignition circuit is too large.
0206 The capacity of the driver airbag ignition circuit is too low.
0301 An emergency seat belt pretensioner in the center of inertia coil has a “Short Circuit” fault.
0302 The emergency seat belt pretensioner in the inertia coil in the center has a “Open circuit” fault.
0303 The emergency seat belt pretensioner in the inertia coil in the center has a “Short” fault to ground.
0304 The emergency seat belt pretensioner in the inertia coil in the center has a “Short Circuit” fault for plus.
0305 The capacity of the seat belt pretensioner ignition circuit in the middle is too large.
0306 The capacity of the seat belt tensioner ignition circuit in the middle is too low.
0401 A belt tensioner malfunction on the driver’s side has a Short Circuit malfunction.
0402 The seat belt pretensioner on the driver’s side has a “Circuit Break” fault.
0403 The driver belt pretensioner has a Short Circuit fault on ground.
0404 The driver belt pretensioner has a “Short Circuit” malfunction to positive.
0405 The capacity of the pilot-belt tensioner ignition circuit on the driver’s side is too large.
0406 The capacity of the pilot-belt tensioner ignition circuit on the driver’s side is too low.
0501 A malfunction of the belt tensioner on the front passenger side has a malfunction “Short circuit”.
0502 The seat belt pretensioner on the front passenger side has a “Circuit Break” fault.
0503 The seat belt pretensioner on the front passenger side has a Short circuit fault to ground.
0504 The seat belt pretensioner on the front passenger side has a “Short Circuit” fault for plus.
0505 The capacity of the ignition circuit for the seat belt pretensioner on the front passenger side is too large.
0506 The capacity of the ignition circuit of the belt tensioner on the front passenger side is too low.
0601 Test lamp 1 has a “Short circuit” fault on ground / open circuit.
0602 Test lamp 1 has a “Short Circuit” fault plus.
0603 Test lamp 1 has a “Short circuit” fault on ground / open circuit.
0604 Test lamp 1 has a “Short Circuit” fault for plus.
0703 Test lamp 2 has a “Short circuit” fault on ground / open circuit.
0704 Test lamp 2 has a “Short Circuit” fault plus.
0901 Undervoltage at terminal 15
0902 Overvoltage at terminal 15
0903 The SRS control unit triggered the deployment of airbags.
0904 The equipment is not configured correctly.

Mercedes-Benz Atego 2 List of fault codes control unit for Comfort Closing System (KSA)

1010 Internal error in the control unit
1011 Control unit EEPROM malfunction
1101 Terminal 30: Overvoltage
1102 Terminal 30: Undervoltage
2021 The wire to the FB interface has a short to ground (reliability during transmission).
2121 A wire to the SD interface has a short to ground.
2122 A wire to the SD interface has a short circuit to positive.
2221 The wire to the GGVS output has a short to ground.
2222 The wire to the GGVS output has a short to positive.
3021 The wire to the actuator ‘M +’ of the driver’s door has a short to ground.
3022 The wire to the actuator element ‘M +’ of the driver’s door has a short circuit to positive.
3121 The wire to the actuator element ‘M-‘ (interior lighting) of the door of the driver or front passenger has a short to ground.
3122 The wire to the actuator element ‘M-‘ (interior lighting) of the door of the driver or front passenger has a short circuit to positive.
3221 The wire to the front passenger door ‘M +’ actuator has a short to ground.
3222 A wire to the front passenger door ‘M +’ actuator has a short to positive.
3321 The wire to the interior key ‘Lock’ has a short to ground.
3421 Wire to interior key ‘Unlock has a short to ground.
4021 The wire to the driver’s door ‘M +’ power window has a short to ground.
4022 The wire to the driver’s door ‘M +’ power window has a short to positive.
4121 The wire to the driver’s door power window ‘M-‘ has a short to ground.
4122 The wire to the power window ‘M ~’ of the driver’s door has a short to positive.
4221 The wire to the ‘M +’ power window for the front passenger door has a short to ground.
4222 A wire to the ‘M +’ power window for the front passenger door has a short to positive.
4321 The wire to the window ‘Motor minus’ the front passenger door has a short to ground.
4322 The wire to the ‘Motor minus’ window of the front passenger door has a short to positive.
4421 A wire to the ‘OTK1 driver’s door window lifter’ key has a short to ground.
4521 Wire to the key ‘Window driver’s door CLOSED1 has a short to ground.
4621 The wire to the button ‘Window front passenger door OPK1 has a short to ground.
4721 The wire to the ‘CLOSED CLOSE DOOR WINDOW LIFT KEY’ button has a short to ground.
4821 The wire to the driver door lock switch has a short to ground.
5040 Hall sensor, driver’s door: no signal.
5140 Hall sensor, front passenger door: no signal.
5221 A wire to the power supply of the Hall sensor has a short to ground.
5510 Incorrect registration of the driver’s door current
5610 Incorrect front passenger door current registration
6020 The wire to the driver’s window lifter drive has an open circuit.
6022 The wire to the driver’s door driver has a short to positive.
6051 The end stop of the driver’s power window drive is defective.
6120 The wire to the front passenger door power window drive has an open circuit.
6122 The wire to the front passenger door power window drive has a short circuit
6151 The end stop of the front passenger door power window drive is defective.

Mercedes-Benz Atego 2 List of hydropneumatic actuation unit (HPS) DTCs

0160 CAN data bus functional failure
0161 CAN bus: communication is lost
0162 CAN connection with FR control unit is broken.
0163 CAN connection with INS control unit is broken.
0164 CAN connection with MR control unit is broken.
1012 Internal fault in the HPS control unit (hydropneumatic activation)
1013 Internal fault in HPS control unit (hydropneumatic activation)
1101 Overvoltage at terminal 30
1102 Undervoltage at terminal 30
1301 Overvoltage at terminal 15
1302 Undervoltage at terminal 15
2005 The power supply to the pressure sensors is faulty as a result of a circuit break or short circuit to ground or a faulty signal wire has a circuit break.
2006 The power supply or signal wire of the pressure sensors is faulty as a result of a short to positive.
3003 Control wires or common ground wire of the solenoid valves are faulty due to an open circuit.
3006 The control wires or common ground wire of the solenoid valves are faulty due to a short to positive.
3104 Control wires to solenoid valves are defective due to a short to ground.
3204 Solenoid valve common ground wire is faulty due to a short to ground.

Mercedes-Benz Atego 2 List of fault codes for central locking system (ZV)

1010 Internal error in the control unit
1101 Terminal 30: Overvoltage
1102 Terminal 30: Undervoltage
2021 The wire to the FB interface has a short to ground (reliability during transmission).
2221 The wire to the FB interface has a short circuit to ground (reliability during transmission).
2222 The wire to the GGVS output has a short to positive.
3021 The wire to the actuator ‘M +’ of the driver’s door has a short to ground.
3022 The wire to the actuator element ‘M +’ of the driver’s door has a short circuit to positive.
3121 The wire to the actuator element ‘M +’ of the driver’s door has a short to ground.
3122 The wire to the actuator element ‘M-‘ (interior lighting) of the door of the driver or front passenger has a short circuit to positive.
3221 The wire to the front passenger door ‘M +’ actuator has a short to ground.
3222 A wire to the front passenger door ‘M +’ actuator has a short to positive.
3321 The wire to the interior key ‘Lock’ has a short to ground.
3421 Wire to interior key ‘Unlock has a short to ground.

Mercedes-Benz Atego 2 List of DTC ignition system ignition (FLA)

TYPE 375.1 with a body 375.850
TYPE 970, 972, 974, 975, 976 with the body 972.890
TYPE 958.0
0100 Control unit supply voltage too low (undervoltage).
0101 Control unit supply voltage too high (overvoltage).
0202 The glow plug has an open circuit.
0203 Glow plug has a short to ground.
0204 Glow plug has a short to positive.
0206 Glow plug voltage difference
0302 The LOW solenoid valve has an open circuit.
0303 The LOW solenoid valve is short to ground.
0304 The LOW solenoid valve is shorted to positive.
0305 Solenoid valve LOW: overload
0310 LOW solenoid valve: continuous control signal
0402 Solenoid valve 2 has an open circuit.
0403 Solenoid valve 2 has a short to ground.
0404 Solenoid valve 2 has a short to positive.
0405 Solenoid valve 2: overload
0410 Solenoid valve 2: continuous control signal
0503 The MIGM solenoid valve is short to ground.
0504 The MIGM solenoid valve is short to positive.
0604 Glow indicator: short to positive
0706 The ignition system control unit FLA recognizes the voltage difference between the glow plug and the control unit.
0707 CAN bus fault
0708 Internal error in the control unit
0709 Internal error in the control unit
0712 The control unit is not parameterized.
0811 Discharge air temperature exceeded
1010 An internal check gives an internal malfunction of the control unit.
1011 An internal check gives an internal malfunction of the control unit.
2021 Receiver wire is faulty as a result of a short to ground.
2022 Receiver wire is faulty as a result of a short to positive.
2031 Mating point malfunction on the remote control FFB control unit
3050 The transmitting module (remote control unit) reports a low voltage.