Description:

This diagnostic trouble code is generated when the PTA control software detects that the transmission input speed is too high. It indicates excessive speed, particularly when there is no weight pushing from behind to justify it. This may be a sign of a fault in the speed sensor or the control software.

Reaction:

Limited or no function of the transmission until the error is corrected, indicating a critical issue with the input speed.

Recommendations:

Reduce Transmission Speed:

• Immediately reduce ground speed to prevent damage to the transmission.

Inspect Input Speed Sensor:

• Check the transmission input speed sensor for proper operation.
• Replace the sensor if it is found to be faulty.

Review Diagnostic Trouble Codes:

• Process any other diagnostic trouble codes that may have priority and could be affecting the input speed reading.

Check Transmission Control Software:

• Ensure the control software is up to date.
• Update the software if a newer version is available.

Note:

Regularly monitor transmission speeds and sensor functionality. Promptly address any issues to avoid severe damage to the transmission system.