New Holland ENG 3035 – Engine Control Module (ECM): Oil Temperature Sensor - Signal Below Range Min.

The voltage signal returning from the engine oil temperature sensor to the controller has dropped below the minimum acceptable threshold. This is most commonly caused by a short to ground in the sensor's wiring circuit, a completely failed sensor (internal short), or severe connector damage.

• T7
• T8.xxx Series
• T9 Series
• Workmaster series
• CR9090
• CX8080 Elevation
• CX8090 Elevation
• B90B
• B110B
• E385
• E485

1. 1

   Inspect the wiring harness running from the oil temperature sensor to the Engine ECM for pinched wires, melted insulation, or chafing against the engine block (short to ground).

2. 2

   Disconnect the sensor and inspect the pins on both the harness side and the sensor side for water intrusion, corrosion, or bent pins.

3. 3

   Check the sensor's internal resistance with a multimeter. A reading of zero ohms (continuity) indicates the sensor is internally shorted and must be replaced.

4. 4

   Turn the key to the ON position (engine off) and probe the harness connector to ensure the ECM is supplying the correct reference voltage to the sensor circuit.

1. 1

   Prep the Machine

   Turn off the engine, engage the parking brake, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate the Sensor

   Locate the oil temperature sensor on the engine block. Note: On many FPT engines, CNH uses a standardized multi-purpose sensor for water, fuel, or oil temperature.

3. 3

   Remove the Sensor

   Depress the locking tab on the electrical connector and unplug it. Using a deep socket or wrench, carefully unscrew the faulty sensor. Have a shop rag ready to catch any residual oil that may weep from the port.

4. 4

   Install the New Sensor

   Thread the new OEM temperature sensor into the port by hand to prevent cross-threading.

5. 5

   Torque to Spec

   Tighten the oil temperature sensor to 20 - 30 N·m (15 - 22 lb ft).

6. 6

   Reassembly

   Reconnect the electrical harness until the locking tab clicks securely. Reconnect the battery.

7. 7

   Verification

   Start the engine and allow it to reach operating temperature. Verify that the oil temperature reads correctly on the dash/monitor and that fault code ENG 3035 changes to an inactive state or clears entirely.