This error code, ECU 000641.06, is triggered when the circuit resistance for the turbocharger actuator is too low, indicating a short to ground. This fault can lead to malfunctioning of the Variable Geometry Turbocharger (VGT) actuator.

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Error code ECU 000641.05 indicates that the current for the turbocharger actuator is too low, suggesting high circuit resistance or an open circuit. This fault can disrupt the proper functioning of the Variable Geometry Turbocharger (VGT) actuator, affecting engine performance.

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This error code, ECU 000641.04, is set when the turbocharger actuator is disabled after multiple unsuccessful attempts to power the controller or perform the actuator learning procedure. This indicates a possible malfunction or calibration issue with the turbo actuator.

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ECU 000640.31 is activated when an external derate command is issued, often due to a steering health signal reporting a problem. This derate command reduces engine power to ensure safe operation under the detected fault condition.

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This error code, ECU 000641.00, is set when the Variable Geometry Turbocharger (VGT) actuator temperature exceeds the expected range. High temperatures can result from excessive engine load, cooling system issues, or actuator malfunctions.

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Error code ECU 000637.10 indicates that the ECU detects an improper pattern or noise in the crankshaft speed signal. This irregularity can lead to incorrect engine timing and potentially cause misfires or reduced engine performance.

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This diagnostic trouble code, ECU 000637.08, occurs when the ECU does not detect the input signal from the crankshaft speed sensor. This missing signal can result in improper engine timing and reduced performance.

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Error code ECU 000637.07 is triggered when the ECU detects that the inputs from the pump position sensor and crankshaft speed sensor are not in sync, indicating a moderate misalignment in timing. This misalignment can affect engine performance and efficiency.

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This error code, ECU 000637.06, occurs when the ECU detects high current on the pump position sensor wiring, indicating low circuit resistance, typically due to a short to ground. This fault can disrupt accurate readings from the pump position sensor.

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Error code ECU 000637.05 is triggered when the ECU detects low current on the crankshaft speed sensor wiring, indicating high circuit resistance, which suggests an open circuit. This condition can lead to inaccurate or missing crankshaft position data, affecting engine timing and performance.

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This diagnostic trouble code, ECU 000637.02, occurs when excessive noise (extra pulses) is detected in the input from the crankshaft position sensor. Such noise can lead to inaccurate engine speed readings and timing issues.

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