SCR fault on Sennebogen 830: More power

The Selective Catalytic Reduction (SCR) system is an essential component of modern machines such as the Cummins-powered Sennebogen 830. However, SCR faults can occur, leading to malfunctions that disrupt the machine's operational efficiency. These problems often manifest themselves by entering a degraded mode, significantly reducing performance and increasing the risk of costly downtime.

To remedy these problems and avoid recurrent breakdowns, the permanent removal of the AdBlue, FAP and EGR systems is an effective solution. Not only does this remove the problem from the system, it also ensures continuity of use without untimely interruptions.

In technical terms, reprogramming the CM2350 ECU plays a crucial role. By modifying the ECU's internal data, it is possible to implement new parameters that optimize the behavior of the Cummins QSB4.5 engine. This approach guarantees enhanced performance while eliminating the constraints associated with faulty emission control systems.

Pollution control failure: advanced diagnostics on Sennebogen 830

A complete and accurate diagnosis is crucial before any work is carried out on an emission control system such as the SCR (Selective Catalytic Reduction) on the Sennebogen 830. Indeed, many users find that certain recurring errors persist despite the replacement of several components. This phenomenon often leads to the decision to permanently remove the system in question, in order to avoid frequent and costly downtime.

During our intervention on this model equipped with the CM2350 system, several faults were identified. Here is a technical analysis of the error codes identified, together with an interpretation of the probable causes and potential consequences:

Fault codes for emission systems

• Code 4863: Aftertreatment SCR Operator Inducement Active - Condition Exists
  Translation: SCR Operator Inducement Active - Condition Exists.
  Interpretation: This code indicates that the system has activated an incentive to encourage the operator to solve an exhaust treatment problem. Possible causes include AdBlue injection failure or SCR catalyst malfunction. The consequences can be a reduction in engine performance or an increase in pollutant emissions.
• Code 3714: Engine Protection Torque Derate - Condition Exists
  Translation: Engine Protection Torque Derate - Condition Exists.
  Interpretation: This fault indicates that the engine has reduced torque to protect against potentially damaging conditions. This may be the result of a problem in the AdBlue circuit or excessive temperature in the exhaust system. The direct consequence is a loss of power which can affect operating efficiency.
• Code 5867: Aftertreatment Diesel Exhaust Fluid Dosing Unit Relay Feedback - Voltage Below Normal
  Translation: Aftertreatment - AdBlue dosing unit relay feedback: voltage too low.
  Interpretation: Below-normal voltage at the AdBlue dosing unit relay suggests an electrical problem, such as faulty wiring or a damaged relay. This can lead to an inability to dose AdBlue correctly, compromising the effectiveness of SCR treatment.
• Code 3558: Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit - Voltage Above Normal
  Translation: Aftertreatment - AdBlue dosing unit n°1: voltage too high.
  Interpretation: Voltage above normal may indicate a short circuit or electrical overload in the AdBlue n°1 dosing unit. Consequences could include over-consumption of AdBlue and erratic operation of the emission control system.

Precise analysis of these codes not only helps to identify problematic components, but also to decide whether complete removal of the AdBlue system is justified to ensure the continued operational reliability of your Sennebogen 818E equipment.

🔧 SCR fault diagnosis and removal on Sennebogen 830

SCR fault on Sennebogen 830

We were called in to work on a Sennebogen 830 equipped with a Cummins QSB4.5 engine. The machine had an SCR fault which automatically reduced engine torque. This SCR fault on the Sennebogen 830 was disrupting the machine's operation and limiting its performance.

Without intervention, the machine remained in degraded mode, making it impossible to operate. It was therefore essential to remove the faulty AdBlue system. The aim was to eliminate active faults and restore full engine power.

Using an electronic diagnostic tool, we accessed the internal data of the CM2350 ECU. Several errors were active. These included incorrect voltage on the AdBlue dosing unit and triggered SCR inducement. This confirmed an SCR fault on the Sennebogen 830, requiring targeted software intervention.

Remove SCR fault and restore performance

After extracting data from the ECU in binary format, we analyzed in detail the parameters related to pollution control. The aim was not just to erase visible errors. We also had to correct the system's internal triggers to prevent any recurrence.

Adjustments included deactivation of AdBlue injection, removal of torque limits and, where necessary, emulation of the particulate filter. A complete recalculation of the checksums was then carried out to ensure perfect consistency with the CM2350 ECU.

Once the corrected file had been injected into the ECU, field tests were carried out. The engine restarted without any warning. No error messages reappeared. The SCR fault on the Sennebogen 830 was completely eliminated. The machine regained full power, with no risk of interruption due to the after-treatment system.

Our other Cummins and Sennebogen services

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