Case IH 2901 – TRANS (Transmission Control Unit / TCU): Signal received from the torque sensor is not in any fault range or normal range tolerance (CCH Only)

This code indicates that the electronic signal being sent from the drivetrain/transmission torque sensor to the control module is erratic or out of the expected operational tolerance. It is not registering as a standard electrical fault, but rather an implausible reading that the system cannot validate.

• Magnum
• Case IH Magnum 235
• Case IH Magnum 250
• Case IH Magnum 260
• Case IH Magnum 280
• Case IH Magnum 290
• Case IH Magnum 310
• Case IH Magnum 315
• Case IH Magnum 340
• Case IH Steiger Series

1. 1

   Check Sensor Gap: Verify the physical installation of the torque sensor. A loose sensor or incorrect air gap can cause the erratic signal.

2. 2

   Check Supply Voltage: Verify the sensor is receiving a steady 5V reference from the TCU.

3. 3

   Inspect Wiring and Connectors: Check the wiring harness between the transmission torque sensor and the TCU for chafing, corrosion, or loose connector pins.

4. 4

   Check for Internal Sensor Faults: Look for the presence of code 2902, which confirms the sensor itself has failed internally.

1. 1

   Power Down and Access

   Turn off the machine, engage the parking brake, and disconnect the battery ground. Locate the transmission torque sensor on the drivetrain/transmission housing.

2. 2

   Harness Disconnection

   Carefully unplug the OEM connector from the torque sensor. Inspect the terminals for moisture, dirt, or bent pins. Clean with contact cleaner if necessary.

3. 3

   Remove the Sensor

   Unbolt and remove the faulty torque sensor from the transmission housing.

4. 4

   Install the New Sensor

   Insert the replacement torque sensor. If the sensor utilizes shims or requires a specific depth/gap setting, ensure it is installed strictly to the service manual's gap tolerance to prevent code 2900 from triggering.

5. 5

   Reconnect and Reassemble

   Reconnect the wiring harness, ensuring the weather-tight seal clicks into place. Reconnect the battery.

6. 6

   Clear Codes and Calibrate

   Connect a diagnostic tool (such as the CNH Electronic Service Tool) to clear the inactive 2901 fault code. Depending on the transmission software, you may need to run a transmission controller calibration routine so the TCU can relearn the new sensor's baseline torque values.