John Deere fault codes

  • CAB 523841.04 – Secondary Brake Sensor Voltage Low

    John Deere error

    The fault code CAB 523841.04 occurs when the CAB control unit identifies that the voltage at the secondary hand brake lever position sensor is lower than normal. Low sensor voltage can result from issues such as poor electrical connections, degraded wiring, or a failing sensor. This specific code applies to the secondary brake system, which…

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  • CAB 523841.03 – Secondary Brake Sensor Voltage High

    John Deere error

    The error code CAB 523841.03 is recorded when the CAB control unit detects that the voltage from the secondary hand brake lever position sensor is higher than expected. This overvoltage could be indicative of an electrical anomaly such as faulty wiring, a malfunctioning sensor, or issues with the vehicle’s voltage regulator. This condition is specific…

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  • CAB 523839.13 – Secondary Brake Not Calibrated

    John Deere error

    Error code CAB 523839.13 is triggered when the CAB control unit detects a calibration issue between the secondary hand brake lever switch and the secondary hand brake lever position sensors. This discrepancy can lead to inaccurate braking signals and reduced functionality of the secondary braking system, which is designed for additional braking support and is…

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  • CAB 523839.02 – Secondary Brake Switch Conflict

    John Deere error

    The fault code CAB 523839.02 is identified when the CAB control unit detects an anomaly in the secondary hand brake switch, specifically that the signal appears to be both open and closed at the same time. This kind of signal conflict could be due to a malfunctioning switch, faulty wiring, or an electronic error in…

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  • CAB 002876.02 – Turn Signal Switch Conflict

    John Deere error

    Error code CAB 002876.02 occurs when the CAB control unit detects that both the left and right turn signal switch inputs are active simultaneously. This condition is unusual and typically indicates a fault within the switch itself or a wiring error that causes both signals to engage at the same time, a scenario that should…

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  • CAB 001504.08 – Seat Switch Circuit Fault

    John Deere error

    The error code CAB 001504.08 is triggered when the CAB control unit detects that the seat (operator presence) switch has been continuously closed (indicating the seat is occupied) for an unusually long duration. This could indicate a potential fault in the switch mechanism, such as sticking, failure to return to the open position, or a…

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  • CAB 001079.04 – Low CAB Sensor Supply Voltage

    John Deere error

    The error code CAB 001079.04 is generated when the CAB control unit identifies a supply voltage to the sensors that is lower than expected. Low voltage can impair the performance of sensors, leading to inaccurate readings or sensor failures, which in turn can affect the control system’s ability to perform critical functions effectively.

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  • CAB 001079.03 – High CAB Sensor Supply Voltage

    John Deere error

    The error code CAB 001079.03 is activated when the CAB control unit detects a higher than normal voltage in the sensor supply circuit. This overvoltage condition can potentially damage sensitive sensor components or lead to incorrect sensor readings, which may affect the overall performance and safety of the control system.

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  • CAB 000629.12 – CAB Control Unit Software Execution Delay

    John Deere error

    Error code CAB 000629.12 indicates a fault where the CAB control unit’s software has failed to execute within the designated timeframe. This problem suggests a processing delay or hang-up, potentially due to software bugs, overloaded system resources, or hardware inefficiencies. Such delays can compromise the timely execution of tasks critical for the proper functioning of…

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  • CAB 000628.12 – CAB Programming In Progress

    John Deere error

    The CAB 000628.12 code indicates that the CAB control unit is currently undergoing a software update. This status code is not an error but a normal indication of the software programming process, signifying that the system is actively updating or loading new software configurations. During this time, the control unit cannot perform any other functions…

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  • CAB 000628.02 – CAB End Of Line Data Fault

    John Deere error

    Error code CAB 000628.02 is triggered when the CAB control unit identifies a failure in its End Of Line (EOL) memory during start-up. The EOL memory is critical for storing final configuration data and settings specific to the vehicle’s assembly process. A malfunction in this memory can result in incorrect or missing configuration data, affecting…

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