This code is set when the DEF tank level sensor detects debris obstructing its operation. Such obstructions can lead to inaccurate readings of the DEF fluid level, which may result in improper DEF dosing and reduced effectiveness of the emission control system.

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This error code indicates that the DEF concentration sensor has detected that the DEF fluid concentration in the tank is moderately higher than the specified range. While not immediately damaging, sustained high concentrations can affect the efficiency of the aftertreatment system.

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This diagnostic trouble code is triggered when the Diesel Exhaust Fluid (DEF) concentration sensor detects the presence of incorrect fluid in the DEF tank. Contamination can significantly disrupt the chemical reactions necessary for effective emissions reduction and potentially damage the aftertreatment system.

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This fault code is set when the DEF concentration sensor detects a malfunction within its system, impacting its ability to accurately measure the DEF concentration. This error may arise from sensor failure, incorrect sensor calibration, or electrical issues affecting the sensor’s operation.

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This code indicates that the DEF concentration sensor has encountered a communication problem, likely due to a failure in the sensor itself or in the communication pathways between the sensor and the ECU. This interruption can result in the inability to monitor DEF quality properly.

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This fault code is triggered when the Diesel Exhaust Fluid (DEF) concentration sensor in the aftertreatment system detects an obstruction, such as debris, that interferes with its ability to accurately measure the DEF concentration. This can lead to incorrect DEF dosing, potentially affecting the emission control performance.

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This fault code is set when the Diesel Exhaust Fluid (DEF) concentration in the tank is detected to be extremely low, potentially indicating issues with DEF quality or contamination that could impair the aftertreatment system’s effectiveness in reducing emissions.

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This diagnostic code indicates that the sixth sensor supply voltage is below the required level, typically due to a short to ground. This low voltage can lead to sensor underperformance, providing inadequate or incorrect data to the ECU.

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This fault code occurs when the sixth sensor supply voltage in the ECU circuit exceeds its specified range, likely due to a short to a 12-volt source. This over-voltage condition can potentially damage sensors and disrupt their normal functioning, affecting vehicle monitoring and control systems.

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This diagnostic trouble code indicates that the fifth sensor supply voltage is below the expected 5-volt level, typically due to a short to ground. This under-voltage condition can lead to sensor malfunctions, affecting their ability to correctly monitor and report vehicle conditions.

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This error code is logged when the fifth sensor supply voltage exceeds the specified 5-volt limit, likely due to a short to a 12-volt source. Excessive voltage can damage the sensors and associated electronic components, leading to potential system failures.

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