Case IH 2553 – UCM: Transmission oil pressure too low

The system detects that the transmission oil pressure has dropped below the acceptable operating threshold.

• Optum
• Puma 130 CVX
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• Puma 225 CVX
• Magnum MX210
• Magnum MX230
• Magnum MX255
• Magnum MX285
• Farmall 40
• Farmall 45
• Farmall 50
• Farmall 115U

1. 1

   Check for other active error codes (such as a sensor short circuit to +5V) and resolve those first

2. 2

   Check the power supply to ensure the tractor battery has not been connected to an external power supply. Disconnect if present and test the system for normal operation

3. 3

   Perform a manual pressure test on the transmission (referencing OEM manual section Hydraulic systems - Pressure test 35.000) to verify if the pressure is actually low or if the sensor is reading incorrectly

1. 1

   Locate sensor

   If the manual pressure test confirms that the transmission has proper hydraulic pressure, the issue is likely electrical. Locate the transmission oil pressure sensor (X-273) on the transmission case.

2. 2

   Inspect wiring

   Inspect the wiring harness and connector for the sensor to ensure there are no breaks or shorts to ground.

3. 3

   Replace sensor

   If the wiring is intact, remove the faulty transmission oil pressure sensor and replace it with a new one (a dab of thread sealant may be required).

4. 4

   Inspect hydraulic circuit

   If the manual pressure test shows that the pressure is actually low, you must inspect the hydraulic circuit for leaks, failing solenoids, or mechanical transmission faults.

5. 5

   Clear code and test

   Once the root cause of the error code has been rectified, clear the error code from the UCM and test the tractor for normal operation.