This diagnostic trouble code indicates that the circuit resistance for the fuel rail pressure surge relief valve is too high, typically indicating an open circuit. This condition can affect the proper functioning of the fuel rail pressure surge relief valve.

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This diagnostic trouble code indicates that the supply pressure of the DEF dosing unit pump is unstable. This instability can affect the accurate dosing of DEF, leading to emissions control issues.

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This diagnostic trouble code indicates that the DEF dosing unit pump motor is sending an incorrect signal. This condition can affect the proper functioning of the DEF dosing system.

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This diagnostic trouble code indicates that the DEF dosing unit pump motor is unable to build pressure when priming. This condition can affect the proper functioning of the DEF dosing system.

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This diagnostic trouble code indicates a data transfer problem between the Engine Control Unit (ECU) and the DEF dosing unit. The ECU is unable to receive CAN bus messages from the DEF dosing unit, which can impact the DEF dosing system’s performance.

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This diagnostic trouble code indicates that the resistance in the Diesel Exhaust Fluid (DEF) dosing unit pump circuit is too low, typically indicating a short to ground. This condition can affect the proper functioning of the DEF dosing system.

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This code indicates that the Diesel Oxidation Catalyst (DOC) efficiency is moderately low. It is currently used for engineering purposes only and may not trigger immediate action but provides valuable data for system monitoring and diagnostics.

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This diagnostic trouble code indicates that the Diesel Oxidation Catalyst (DOC) efficiency is extremely low. This can affect the overall performance of the emissions control system, leading to higher emissions and potential damage to downstream components.

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This informational fault code notifies the operator that the machine has reached its final derate stage. At this point, the engine performance may be significantly limited to ensure compliance with emissions regulations and to protect the vehicle’s systems.

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This informational fault code notifies the operator that the Selective Catalytic Reduction (SCR) system is in Stage #2 derate. It provides a warning about how long the operator has before the machine reaches its final derate state, which can significantly limit engine performance.

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This informational fault code notifies the operator that the Selective Catalytic Reduction (SCR) system is in Stage #4 derate. It provides a warning about how long the operator has before the machine reaches its final derate state, which can significantly limit engine performance.

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