EPC 000177.00 – Transmission Oil Temperature Very High

EPC 000177.00 (EPC 177.00)

Code: 000177.00

Shortcode: 177.00


This error code, EPC 000177.00, indicates that the transmission oil temperature has exceeded 106°C (223°F). High transmission oil temperature can lead to overheating, which may cause damage to the transmission components and reduce the overall efficiency of the system.


When this error is detected, the control system may limit the transmission’s functionality to prevent further temperature increase and potential damage. This could result in reduced performance or a temporary shutdown of the transmission.


Check Cooling System:

  • Inspect the transmission cooling system, including the radiator, cooling fan, and coolant levels. Ensure all components are functioning correctly and coolant levels are adequate.

Inspect Transmission Oil Level:

  • Verify that the transmission oil level is within the recommended range. Low oil levels can lead to increased temperatures. Top up the oil if necessary.

Examine Oil Quality:

  • Check the condition of the transmission oil. If the oil is degraded or contaminated, replace it with new oil according to the manufacturer’s specifications.

Inspect Oil Filter:

  • Ensure that the transmission oil filter is not clogged or restricted. Replace the filter if necessary to maintain proper oil flow.

Check for Blockages:

  • Inspect the transmission oil lines and passages for any blockages or restrictions that could impede oil flow and cooling.

Monitor Operating Conditions:

  • Avoid operating the tractor under extreme conditions that could lead to overheating, such as heavy loads or high ambient temperatures.

Reset and Test System:

  • After addressing the above issues, reset the system and monitor the transmission oil temperature to ensure it remains within the normal operating range.


Regular maintenance of the transmission cooling system and monitoring oil levels and quality are crucial to prevent overheating and ensure the longevity of the transmission components.

Control Units: John Deere

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