Case IH 2516 (127.16) - DEC – DEC (Driveline Electronic Controller): Transmission Pressure Sensor - Pressure high

The electronic control module has detected that the signal voltage from the transmission hydraulic charge pressure sensor is above the normal operating range (typically indicating a short to positive, an open circuit, or an actual abnormally high hydraulic pressure condition).

• MAXXUM T4E
• VESTRUM CVX
• Magnum 180
• Magnum 220
• MX285
• Puma 150
• Puma 165 CVXDRIVE
• Puma 220 CVT
• STX Steiger
• Steiger 350-600 horsepower models

1. 1

   Inspect the transmission wiring harness (CVT harness) and the pressure sensor connector for corrosion, broken wires, or a short circuit to a positive voltage source.

2. 2

   Connect a diagnostic laptop (Case IH EST or Jaltest) to monitor live voltage data from the transmission pressure sensor to see if it is pegged high (e.g., above 4.95V on a 5V reference circuit).

3. 3

   Use a mechanical hydraulic pressure gauge to verify the actual transmission charge pressure to rule out a genuine mechanical high-pressure issue versus an electrical sensor failure.

4. 4

   Check if the code can be cleared; note that on some ICU software versions, this fault code must be cleared using the EST laptop rather than the cab display keys.

1. 1

   Access the Sensor

   Locate the transmission pressure sensor on the transmission valve block/housing.

2. 2

   Disconnect and Test

   Disconnect the sensor. If the live data voltage on your diagnostic tool drops, the wiring is likely good, and the sensor itself has failed internally (shorted).

3. 3

   Replace the Sensor

   Unthread the faulty transmission pressure sensor and install the new OEM replacement part.

4. 4

   Clear Codes

   Connect the Case IH EST or Jaltest diagnostic software and clear the inactive 2516 (127.16) fault code from the DEC memory.

5. 5

   Calibrate

   Perform a DEC transmission calibration procedure using the diagnostic tool to ensure the new sensor is properly adapted to the Driveline Electronic Controller.