Scania EMS Fault Codes 1316-4170

Scania EMS Fault Codes 1316-4170

#ошибки_скания, #коды_ошибок_скания, #5_скания_ошибки, #ошибки_скания_5_серии

Коды ошибок Scania помогают диагностировать неисправности без использования дополнительной техники. Ошибки в Scania 5 серии отображаются на дисплее бортового компьютера. Неисправности разделены по блокам – узлам и системам автомобиля, каждой присвоен номер, и для каждой даны рекомендации по устранению.
Например, на экране ошибка в блоке EMS под номером 290. EMS – это система управления двигателем, а 290 в этом блоке означает неправильную индикацию положения дроссельной заслонки. Ниже приведены все коды ошибок Scania 5 серии.

Расшифровка система SCANIA 5 серии

ASC — Система защиты от складывания секций
AHS — Система дополнительного подогрева
APS — подача сжатого воздуха
AUS — Аудиосистема
AWD — 4wd привод
BCS — система шасси автобуса
BMS — система управления процесса торможения
BWE — электрическая система дополнительного оборудования
BWS — система управления дополнительным оборудованием
VIS — система обеспечения обзора
CCS — система поддержания микроклиматом
COO — Координатор

SMS — Система управления подвеской

CSS — система подушек и ремней безопасности

DIS — Датчик расстояния
EEC — система нейтрализации отработавших газов
EMS — система правление движка
FLC — Камера переднего наблюдения
GMS — система правление кпп
GMS — система правление кпп
ICL — Комбинация приборов
LAS — система замков и сигнализации
LDW — Предупреждение об уходе с выбранной дорожной полосы
MGS — система электрической машины
RES — Подзаряжаемая система хранения энергии
RTC — Scania Communicator
RTI — система дорожной информации для транспортных организаций

В нашей базе данных диагностических кодов неисправности автомобилей SCANIA собраны все коды неисправности по всем система.

Если Вы не смогли найти именно Ваш код неисправности то создаем тему на нашем форуме и мы обязательно с этим разберемся и расшифруем код неисправности любой системы SCANIA

EMS Scania Engine Control Unit Fault codes list 1316-4170

See also: Scania trucks service repair manuals PDF

2098547, 2098546, 2098545, 2096902, 2096901, 9000000, 2089202, 2089201, 2089200

Oil pressure sensor

The signal from the oil pressure sensor in the engine lubrication system is below the normal value. This means that the oil pressure, measured at a certain speed, is lower than normal.

Safety valve located in the housing of the oil pump.

Pressure reducing valve, usually located in the housing of the centrifugal oil purifier.

Other causes may be a damaged oil pump, oil filter, centrifugal oil cleaner, suction tube and / or low oil level in the oil pan.

Clogging the suction strainer may be another possible cause.

Excessively low oil pressure can cause serious damage to the engine and cause it to break.

The control lamp for low oil pressure is on.

Check the valves in the oil system and check for damage to the oil pump, oil filter, centrifugal oil purifier, suction tube and suction strainer. Also check the oil level in the crankcase.

EMS 1318

Fan speed sensor

The power supply voltage of the fan speed sensor was below normal.

Electrical connectors or electrical leads to the fan have been damaged.

Malfunction of the fan speed or coolant speed sensor electrical circuit.

Low engine cooling efficiency. Risk of engine overheating.

The fan speed sensor and the coolant pump have a common power supply. In the event of a fault in one of the elements, it may affect the electrical circuits of other elements.

Check the fan solenoid valve as well as the electrical connectors and wiring.

Check fan speed sensor and coolant pump with connectors and electrical wiring.

EMS 1376

2110164, 2110165, 2110166, 2110162, 2110116

The battery voltage was above the allowable value. It was 47 V or more for 0.5 seconds.

This fault may be caused by the operation of the starter charger.

If the speed is not recorded, the engine stops immediately without a delay. If the engine is recording the engine speed, the engine will continue to idle for 5 minutes. After that, the engine will stop.

Check the battery and alternator.

Check the connectors and wiring.

EMS 1378

It is possible that this fault is caused by a defective alternator or battery circuit. It is also possible that the power of simultaneously enabled consumers is too high.

A crankshaft speed of less than 400 rpm during engine start is not considered a malfunction.

The fault affects the emission of nitrogen oxides (NOx) by the car, and a warning lamp lights up in the instrument cluster, warning of a high level of pollutants. On vehicles with NOx control, a text message is also displayed.

Cars with NOx control

An active DTC limits the maximum engine torque to approximately 40% after the engine has been running for 50 hours.

An active DTC cannot be deleted from the control unit. When the malfunction is resolved so that the malfunction code becomes inactive, the control unit must ensure that the malfunction has been eliminated.

Start the engine and let it run at idle for at least 15 seconds.

If the fault is resolved, the fault code becomes inactive. Clear the fault code.

Using the ignition key, turn off and turn on the power three times in a row at intervals of 10 seconds to deactivate the test lamp.

Battery voltage when the engine is at idle was below the allowable value.

It is possible that this fault is caused by a defective generator or battery circuit. Another reason may be too high current consumption.

Starting the engine is difficult and certain high current-consuming functions are deactivated . Examples of disconnecting equipment: seat heating and heated exterior mirrors.

Check the power and consumption of the system.

EMS 1379

Generator malfunction may result in too high charging current.

The engine control unit turns off the EGR system and the engine power decreases.

Check the generator and measure the system voltage.

The battery voltage was above the allowable value. Within 5 seconds, the battery voltage was more than 30.56 V.

The failure of the generator can be, for example, an increase in the voltage of the on-board network to 36 V.

EMS 1592

Initiation of the throttle operating range at engine start gives the wrong value.

The throttle potentiometer cannot find the throttle zero mode.

The throttle adaptation ended in failure.

There may be a fault in the throttle potentiometer.

The engine goes into emergency mode.

Check the power supply of the potentiometers and the actuator throttle.

Check wiring and connectors.

EMS 1594

The generator shows:

that it does not perform charging, although it is on, i.e. at engine speeds that are equal to or above idle

that it performs charging, although not included, i.e. at engine speeds that are equal to or below idle

Short circuit or open circuit generator.

The poor state of the power supply system. Functions that consume a large amount of current and therefore require charging system performance will be disabled. Examples of these functions are: low beam, seat heating and heated rear view mirrors.

The engine control unit switches off the exhaust gas recirculation system. In accordance with current legal requirements, engine power is reduced on vehicles that are equipped with NOx exhaust control.

The fault code cannot be cleared while the fault is present.

Check electrical connectors, wiring and alternator.

EMS 1601

Gas pressure sensor

Deviation of the reference voltage of the gas pressure sensor.

Faulty gas pressure sensor or short circuit in the electrical circuit.

The engine stops or goes into fail-safe mode of operation. Torque is reduced to protect the engine.

Check the element, connectors and wiring.

Check the supply voltage of the sensor and engine control unit.

EMS 1602

Gas pressure sensor reference voltage too low

A short to ground in the supply voltage circuit of the gas pressure sensor.

Motor control supply voltage too low.

EMS 1603

Gas pressure sensor reference voltage too high.

Short to battery + in the gas supply voltage sensor voltage supply circuit.

Motor control supply voltage too high.

The engine stops or goes into failsafe mode of operation. Torque is reduced to protect the engine.

EMS 1617

Throttle Voltage Reference Deviation.

Damaged throttle or short circuit.

Check the element, connectors and wiring. Replace throttle valve.

EMS 1618

Throttle reference voltage too low

Short circuit to ground on the throttle circuit or battery voltage too low.

EMS 1619

Throttle reference voltage too high.

Short circuit on the throttle electric circuit + battery or battery voltage too high.

EMS 1681

The voltage in the circuit was outside the limits.

A short to ground on the fan solenoid circuit.

If the fan is electrically controlled, it cannot be turned off.

If the fan is hydraulically controlled, it will not operate.

Check the electromagnetic winding of the fan, as well as the elements of the electrical circuit, electrical connectors and wiring.

EMS 1682

Short to battery + in the fan solenoid circuit.

If the fan is controlled hydraulically, it cannot be turned off.

If the fan is electrically controlled, it will not operate.

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EMS 1683

Cooling fan for additional cooler

A short to ground in the electrical circuit of the auxiliary cooler fan.

Check the electromagnetic winding of the fan, as well as electrical connectors and wiring.

EMS 1684

Short to battery + in the additional circuit of the additional cooler fan.

If the fan has a hydraulic drive, it cannot be turned off.

If the fan has an electric drive, it will not operate.

EMS 1800

Engine crankshaft speed sensor

Incorrect value from engine speed sensor.

Fault in the electrical circuit.

Failsafe mode: Limit torque and engine speed. Increased idling speed.

Check the connectors and electrical wiring. Replace sensor.

EMS 1830

Emergency mode: Limit torque and engine speed. Increased idling speed.

EMS 1831

No signal from engine speed sensor

The sensor may not be connected to ground.

The engine goes into failsafe mode of operation. Engine does not start again after shutdown.

Check the element, connectors and wiring. Replace engine speed sensor.

EMS 2065

2098547, 2098546, 2098545, 2096902, 2096901, 2110164, 2110165, 2110166, 2110162, 2110116, 9000000, 2089202, 2089201, 2089200

The clutch is worn.

The car has been modified so that the gearbox does not match the vehicle’s SOPS file.

The speed sensor is located incorrectly.

The engine control unit reduces torque until the clutch stops slipping.

If repair and maintenance has not been done recently:

Check for actual clutch slippage.

If repair and maintenance has been done recently:

Check that the appropriate gearbox type (correct SOPS file) is programmed in the vehicle.

Check the vehicle speed sensor for proper location.

EMS 4096

2098557, 2098556, 2110163, 2110160, 9000000, 2089202, 2089201, 2089200

The engine speed exceeded the allowable value.

Incorrect handling, for example, incorrectly shifted to a lower gear.

The fuel supply to the engine stops at 3000 rpm. Restoration of the fuel supply occurs after the engine speed becomes less than 3000 rpm. In this case, the engine braking mechanism works with maximum efficiency. After reducing the engine speed, normal engine operation is restored.

Notify the driver about the possibility of engine damage when the engine is running at high speeds.

EMS 4097

SCR – Main Unit

Internal malfunction in the main unit.

As a result of a fault, the injection of the reagent is turned off.

An active DTC limits the maximum engine torque to approximately 40%.

Start the engine four times in a row. If the DTC is still active, replace the SCR control unit; This means that the main unit should be replaced.

In order for the control unit to verify a fault, it must perform a sequence of checks. When the control unit performs a complete sequence of checks without detecting a fault, the fault becomes inactive.

The control unit must check in four consecutive cycles, which means that the engine should be started four times in a row.

You can click on the DTC monitoring function and view the DTC. There you can see if the conditions under which the control unit confirms the repair are satisfied. When conditions are satisfied and a check is performed, the status of the DTC is displayed during the check process. If the DTC is under review, the control unit has detected a fault. If the fault is resolved, the fault code becomes inactive. Clear the fault code.

To turn off the alarm, turn off and turn on the ignition with the ignition key three times in a row at 10-second intervals.

EMS 4102

Defrosting the reagent in the SCR system

The pump does not raise the pressure in the SCR system for a given time.

Reagent tank is empty.

Reagent lines are leaking or clogged.

The heating system in the tank is not able to defrost the reagent during cold weather.

Reagent dispenser does not close completely.

Pressure sensor malfunction.

The vent valve is stuck open.

Check if there is already some reagent in the tank and make sure that it is not frozen.

Check to see if the vent is clogged tank reagent channel.

Check whether the prefilter filter, main filter or filter in the combination tank is clogged.

Check if the reagent tank is working.

Ensure the reagent dispenser closes completely.

If the fault lies in the main unit, it should be replaced.

To ensure that the problem has been rectified, you can check the “Recognizing DTCs for NOx Control Invalid”, which is on the “Checks” tab in SDP3. This test should be performed outdoors, because the exhaust gas temperature becomes very high and there is a risk that the exhaust hose will melt. Performing this check may take from 5 to 30 minutes, depending on which DTCs are active.

Start the engine and turn it off.

EMS 4103

The pressure in the SCR system does not fall as expected when opening the solenoid valve in the return line.

A fault code can be generated if the reagent tank vent is plugged.

The cause of the fault can also be:

Make sure the reagent in the return line is not frozen. If the reagent is frozen : Check that the engine coolant level is not too low.

To check if the return pipe heating is working. Start the engine and make sure the piping is getting warm. If not, make sure the engine coolant reaches it as it should be.

To ensure that the problem has been rectified, you can check the “Recognizing DTCs for NOx Control Invalid”, which is on the “Checks” tab in SDP3. This test should be performed outdoors, because the exhaust gas temperature becomes very high and there is a risk that the exhaust hose will melt. Performing this check may take from 5 to 30 minutes, depending on which DTCs are active.

EMS 4104

Data exchange between the NOx sensor after the catalytic converter and the SCR control unit.

The SCR control unit receives several CAN messages from the NOx sensor in too fast a sequence.

Failure to communicate between the NOx sensor and the SCR control unit.

Check the electrical wiring and clean the connectors.

If this does not help, replace the NOx sensor.

Turn off and turn on the onboard power supply with the ignition key.

EMS 4105

The SCR control unit does not receive the CAN message from the NOx sensor.

Data transfer between the NOx sensor and the SCR control unit is not working.

If the malfunction code occurs once, it may be due to the replacement of the NOx sensor.

If the fault code repeats, there is probably a fault in the electrical supply voltage circuit to the NOx sensor, NOx sensor, electrical connectors or wiring.

If this does not help, make sure that the SCR control unit receives the ignition voltage (U15) and there is a voltage supply to the NOx sensor control unit.

Turn off the power with the ignition key, wait at least 90 seconds and then turn it on again with the key.

EMS 4106

Problem with CAN bus communication with NOx sensor after catalytic converter.

The malfunction may be caused by the loss of power supply to the NOx sensor and the simultaneous power supply to the SCR control unit.

If the fault recurs frequently, there is probably a fault in the connectors or the wiring.

Malfunction adversely affects engine emissions of nitric oxide. The control lamp is on.

Check the wiring and clean the connectors. Ensure that power is simultaneously supplied to the SCR control unit and the NOx sensor.

If this does not help, first replace the NOx sensor, and if that does not help, replace the SCR control unit.

Switch off the ignition with the key, wait 90 seconds and then turn it on again. If the fault is resolved, the fault code becomes inactive. Clear the fault code.

Turn off and turn on the ignition three times at intervals of 10 seconds to deactivate the test lamp.

NOx sensor connection

The engine control unit has no CAN message from the NOx sensor. If the vehicle is equipped with an SCR system, the CAN message is transmitted via the SCR control unit.

Communication between the engine control unit and the SCR control unit or between the SCR control unit and the NOx sensor is interrupted.

If a malfunction code 4108 was generated at the same time, there may be a problem in the communication between the engine control unit and the SCR control unit.

If a malfunction code 4108 was generated at the same time, there may be a communication failure between the SCR control unit and the NOx sensor.

If the DTC was generated only once, it may be due to the interruption of the voltage supply to the NOx sensor while maintaining the voltage supply to the SCR control unit.

The SCR control unit in the main unit may be faulty.

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If a fault code is generated frequently, it may be due to a problem in the wiring harness or connectors.

Also check for DTCs related to CAN communication in other control units. Troubleshoot these problems first.

If this does not help, check whether the SCR control unit and the NOx sensor are receiving an on / off voltage (U15) signal simultaneously. If the above action does not help, replace the NOx sensor first, and if that does not work, replace the SCR control unit. However, it is not typical for the fault to be covered in the SCR control unit. Before replacing the SCR control unit, make sure that the fault is not caused by something else.

EMS 4107

Communication with the SCR control unit

CAN MSG8 message “NOx sensor data before catalytic converter” (NOx sensor data before catalytic converter) is not received from NOx sensor. If the vehicle configuration is configured for an SCR system, this message is received via the SCR control unit.

The data exchange between the engine control unit and the NOx sensor in front of the catalytic converter was interrupted.

On vehicles with the SCR system, this message is sent via the SCR control unit. If a 100C fault code was generated at the same time, there may be a communication failure between the engine control unit and the SCR control unit. See fault code description 100C.

If the vehicle is equipped with an SCR system and the DTC 10C was not generated simultaneously, there may be a communication failure between the SCR control unit and the NOx sensor in front of the catalytic converter.

If the DTC was generated only once, it may be due to the interruption of the voltage supply to the NOx sensor while maintaining the voltage supply to the SCR control unit. If this DTC is generated frequently, it may be due to wiring problems or loose connectors.

Clear the DTC memory and try to start the engine.

Turn off and turn on the onboard power supply with the ignition key several times.

If the DTC is generated again, check the wiring and clean the electrical connectors.

If the fault code is still generated, make sure that both the SCR control unit and the NOx sensor in front of the catalytic converter receive voltage through terminal U15 simultaneously.

If the fault is not detected, first replace the NOx sensor for the catalytic converter and then the SCR control unit (if equipped with the car).

Problem with CAN bus communication with NOx sensor in front of the catalytic converter.

On engines with a NOx control system, torque is reduced by 40%. The fault code cannot be cleared while the fault is present. When the malfunction is resolved, the control unit must verify this in order for the fault code to become inactive.

EMS 4108

The data exchange between the engine control unit and the SCR control unit has been stopped.

The malfunction may be due to the loss of power to the SCR control unit and the simultaneous powering of the engine control unit.

Reagent injection is deactivated.

As data exchange stops, no additional DTCs for the SCR system are generated.

If there are other DTCs for the SCR system, first diagnose them.

Turn off and turn on the ignition with the ignition key several times. If there is no fault code indicating that the SCR system is off, check the wiring and clean the electrical connectors. Make sure the fuses for the SCR system are not blown.

Make sure that both control units are powered at the same time.

If the steps above do not help, replace the SCR control unit. If this does not help, replace the engine control unit.

The engine control unit does not receive a CAN message from the NOx sensor. If the vehicle is equipped with an SCR system, the CAN message is transmitted via the SCR control unit.

Communication between engine control unit and SCR control unit interrupted.

If there are several faults, the SCR control unit shuts down the SCR system to prevent damage. This means that communication between the SCR control unit and the engine control unit has been lost.

If this DTC is generated alone and there are no other DTCs of the SCR system, this may be due to the interruption of the supply voltage to the SCR control unit while simultaneously supplying voltage to the engine control unit.

The SCR control unit in the pump may be faulty.

If fault code 5688 was generated at the same time, there may be a fault in the engine control unit.

If this DTC was generated, and DTC 5688 is not, it is possible that there is a fault in the wiring.

Fault codes are generated based on information from the SCR control unit. If there is no communication between the SCR control unit and the engine control unit, no SCR related fault codes are generated in the engine control unit.

If this DTC is generated, there is no communication between the engine control unit and the SCR control unit. This may imply that there are no SCRs related to the SCR in the engine control unit, and those that have been erased will not be generated again, even if there is still a fault.

If there are fault codes for the SCR system, first diagnose them.

Switch the ignition on and off several times. Fault codes that were not generated in the engine control unit could be present in the SCR control unit, because this fault code is active.

If there is no fault code indicating that the SCR system is currently disconnected, check the wiring and clean the electrical connectors. Make sure the fuses for the SCR system are not blown.

Also make sure that both control units receive ignition signals at the same time (U15).

EMS 4109

Incorrect CAN version

The engine control unit and the SCR control unit do not agree on which CAN version is used.

A fault occurs if one of the control units has been replaced and they are not compatible with each other.

Check the spare part number of the control unit and replace the control unit that has the wrong spare part number.

Turn off the ignition with the key, wait at least 90 seconds and then turn it on again with the key.

EMS 4110

NOx sensor in front of the catalytic converter did not start within the specified time.

NOx sensor malfunction.

On engines with a NOx control system, torque is reduced by 40%. The fault code cannot be cleared while the fault is present. After the malfunction has been rectified, in order for the malfunction code to become inactive, the control unit must verify this.

Replace the NOx sensor. After the startup phase, the fault code must be inactive.

EMS 4111

The NOx sensor after the catalytic converter did not start within the specified time.

EMS 4112

The crankshaft speed for some period exceeded the permissible value.

This malfunction may be caused by difficult gear changes or fuel ingress into the oil.

The engine retarder was activated to reduce the engine speed. With this fault, the maximum torque of the engine is reduced by 30 %. Increased engine speed at idle will also be lower than usual.

Notify the driver about the possibility of engine damage when the engine is running at high speeds. Check for fuel leaks.

EMS 4113

This DTC may be due to poor gear changes, but it may also be due to the retarder motor brakes.

The engine retarder was activated to reduce the engine speed. Check whether a fault code 4112 is generated at the same time.

EMS 4114

The pressure in the SCR system does not fall as expected when the injection valve is open.

The cause of the malfunction may be:

Reagent freezing in the injection pipe.

Freezing or crystallization of the reagent in the dispenser, piping or spray nozzle of the reagent.

Make sure that the engine coolant level is not too low.

To verify that the heating line between the main unit and the reagent dispenser is working. Start the engine and make sure the suction line gets warm. Otherwise, make sure that the coolant from the engine reaches the line as it should be. Also ensure that the water valve opens fully.

If heat is present, remove and clean the nozzle sprayer, reagent dispenser and piping.

EMS 4116

SCR air pressure

Air pressure in SCR system too high.

The formation of crystals in the nozzle sprayer or the pipe between the reagent dispenser and the nozzle sprayer.

The air line between the main unit and the reagent dispenser is plugged or twisted.

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Malfunction in additive dispenser.

Replace additive dispenser.

If the problem persists, replace the main unit.

There should be no other active DTCs for air pressure in the SCR system and for faults in the main unit.

Make sure the SCR system starts up and perform a road test of a vehicle lasting 15 minutes four times in succession. Switch off the ignition with the key at intervals of 90 seconds between cycles.

You can click on the DTC monitoring function and view the DTC. There you can see if the conditions under which the control unit confirms that the fault has been eliminated have been satisfied. When conditions are satisfied and a check is performed, the status of the DTC is displayed during the check process. If the DTC is under review, the control unit has detected a fault. If the fault is resolved, the fault code becomes inactive and can be erased.

Air pressure is too high.

Replace additive dispenser. If the fault still persists after this, replace the SCR main unit. Perform SCR system checks in SDP3.

In order to ensure that the malfunction has been rectified, in SDP3, recognize the invalidity of the malfunction codes of the NOx control system. This operation should be performed outdoors, because the exhaust gas temperature becomes very high and there is a risk that the exhaust gas hose will be damaged.

EMS 4118

Incorrect or unreliable data.

Internal malfunction in the control unit.

Ensure that the diaphragm pump is not clogged or damaged. If there is damage, replace the diaphragm pump.

Turn off the ignition with the key, wait at least 90 seconds and then turn it on again with the key. If the DTC is still active, replace the SCR control unit; This means that the main unit should be replaced.

EMS 4119

Turn off the ignition with the key, wait at least 90 seconds and then turn it on again with the key. If the DTC is still active, replace the SCR control unit; This means that the main unit should be replaced.

EMS 4120

Replace the SCR control unit. This means that the main unit must be replaced.

Turn off the ignition with the key, wait at least 30 seconds and then turn it on again with the key.

EMS 4121

SCR system emergency stop

The SCR system was turned off.

The SCR system was turned off due to too high temperature in the main unit.

If the temperature drops to an acceptable level, the SCR system starts up again.

Check for any other DTCs that have been generated and may have caused this DTC, and use them to troubleshoot.

Switch off the ignition with the key, wait at least 90 seconds and then turn it on again with the key for 25 seconds.

The temperature limit for the main SCR unit has been exceeded.

The SCR system was deactivated due to the too high temperature of the main unit.

If the temperature drops to an acceptable level, the system will start again.

EMS 4123

Voltage supply to elements in the SCR system

The voltage in the electrical supply circuit of the reagent dispenser was out of range.

Short to battery + in the reagent dispenser electrical circuit.

Check the reagent dispenser, its connectors and wiring.

Check the battery voltage.

EMS 4124

Interruption in the electric supply circuit of the reagent dispenser.

EMS 4128

SCR reagent pressure

The reagent pressure at start-up drops by more than 0.5 bar.

The vent valve is stuck open or there are leaks in the reagent hose.

The SCR system is turned off until the next cycle of motion begins (ignition is switched off with the key) and any reagent is injected, which leads to an increase in the level of discharge. When the system is turned off, fault codes 100C, 100A and 100B (CAN time exceeded) can be generated. Be sure to troubleshoot this problem before taking action on codes 100C, 100A, and 100B.

Note: Diagnostics regarding this DTC cannot be performed while the SCR system is off. Therefore, this DTC cannot become passive or be generated again (if deleted) before the next cycle of motion. In order to be able to read the fault codes, turn off the ignition with the key for 90 seconds and then turn it on again.

Check whether the vent valve is open in the open position. Check reagent hose for leaks.

EMS 4129

SCR – Reagent Injection Valve

With injection, the pressure in the SCR system does not decrease as expected.

As a result of this fault, the SCR system shuts down.

When the ambient temperature is below -10 ° C, a malfunction may result in damage to the injection valve in the reagent dispenser.

Make sure the hose is not twisted.

Check whether reagent crystals are present in the reagent dispenser or main unit. Wash off the crystals with water.

If the temperature was below -10 ° C, check to see if the injection valve in the reagent dispenser is leaking.

To ensure that the problem has been rectified, you can check the “Recognizing DTCs for NOx Control Invalid”, which is on the “Checks” tab in SDP3. This test should be performed outdoors because the exhaust gas temperature becomes very high and there is a risk that the exhaust gas hose will melt. Performing this check may take from 5 to 30 minutes, depending on which DTCs are active.

Verify that the SCR system is running four times in sequence. Switch off the ignition with the key at intervals of 90 seconds between cycles.

Emergency stop engine on request DLN 1

EMS 4130

An improbable signal at startup.

Input data is not recorded when the ignition is turned on.

On engines with an NOx control system, to eliminate the problem, you must turn off the ignition with a key, wait 90 seconds and then turn it on again.

Digital inputs are not recorded when the ignition is turned on with a key.

Switch off the voltage, wait 90 seconds.

Turn on the voltage again.

If the fault is resolved, the digital fault code becomes inactive.

EMS 4131

Voltage supply for SCR control unit

The SCR control unit turns off too soon. The power to the SCR system was turned off before the system was turned off.

If the car has a mass switch (used in buses and ADR cars), a fault code can be generated if the battery mass switch is used within 90 seconds after the ignition is turned off.

There may be a fault in the supply voltage to the SCR system.

In addition, the malfunction may be due to an internal malfunction in the control unit.

If at the same time a fault code 5657 is generated, the fault is probably not in the SCR system.

Full system shutdown will not be performed. It takes approximately 90 seconds to turn off the SCR system after the ignition key is turned off.

This means that a reagent will remain in the hoses and in the nozzle dispenser.

This can cause the system to freeze in cold weather, which is likely to cause damage to the SCR system.

Switch off the ignition with the key, wait 90 seconds and then turn it on again. If the DTC remains inactive, delete the DTC.

If the fault code persists and at the same time no fault code 5657 has been generated, check the power supply to the main unit.

EMS 4132

The SCR control unit shuts down too late.

Internal fault in the main unit or faulty wiring of the SCR control unit.

SCR system does not turn off.

The current is still consumed, which can lead to a low battery.

Check electrical wiring.

EMS 4133

As a result of a fault, the SCR system shuts down and the reagent injection shuts down.

When the SCR system is turned off, fault codes 4108, 4106, and 4107 relating to data exchange with the SCR system can also be generated. Perform a primary troubleshooting using this fault code.

When the SCR system is disabled, the communication between the SCR control unit and the engine control unit can be interrupted. To ensure correct handling of the DTC, control units must be able to communicate with each other. Try to reestablish the connection, for which you should turn off the ignition, wait 90 seconds and turn on the ignition again.

Switch off the ignition with the key, wait at least 90 seconds and then turn it on again with the key for 30 seconds.

EMS 4134

When the SCR system is turned off, fault codes 4108, 4106, and 4107 relating to data exchange with the SCR system can also be generated . Perform a primary troubleshooting using this fault code.

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