New Holland 3010 – ECM: Air Intake Temp Sensor Signal Exceeds Maximum

The Engine Control Module (ECM) has detected that the signal from the air intake temperature sensor is higher than the maximum allowable voltage. This abnormally high voltage incorrectly signals a very low air temperature to the ECM. As a result, the engine may over-fuel, leading to rough idle, poor fuel economy, black smoke, and potentially triggering a limp mode or engine derate to prevent damage. This condition typically indicates a short to power in the wiring, a faulty connection, or a failed sensor.

• T7.170
• T7.185
• T7.200
• T7.210
• T7.230
• T8 Series
• T3010
• T3020
• T3030
• T3040
• Boomer
• Workmaster
• T3 Series
• T4 Series
• T5 Series
• TG Series
• T8000
• T9000
• T3000 Series
• Models with F5C engines
• Models with ISM engines
• backhoes
• loaders
• Case Magnum
• Steiger

1. 1

   Visually inspect the air intake temperature sensor (located in the air intake piping), its electrical connector, and the wiring harness for corrosion, dirt, loose pins, or frayed wires.

2. 2

   Check for a short to power by disconnecting the sensor, turning the key ON (engine off), and measuring voltage between the harness signal wire and chassis ground (should be close to 0V; 5V or 12V indicates a short).

3. 3

   Verify the ECM reference voltage by measuring across the two harness connector terminals with the key ON (should be approximately 5V).

4. 4

   Verify the ground circuit by measuring between the harness ground terminal and the battery positive terminal (should read approximately 12V).

5. 5

   Test the sensor's resistance across its two pins (should be 2.0 to 6.0 kOhms at 25°C/77°F). Warm the sensor with a hairdryer to confirm resistance steadily decreases as temperature rises.

1. 1

   Disconnect battery

   Disconnect the negative battery terminal to prevent electrical damage before starting the repair.

2. 2

   Remove the faulty sensor

   Carefully release the locking tab on the electrical connector and unplug it. Unscrew the old sensor from the intake manifold or air pipe.

3. 3

   Install the new sensor

   Apply a small amount of thread sealant if recommended. Thread the new sensor into place by hand to avoid cross-threading, tighten to manufacturer specification, and securely plug in the electrical connector.

4. 4

   Clear codes and test

   Reconnect the negative battery terminal. Use a diagnostic scanner to clear the stored fault codes from the ECM, then start the engine to verify the fault does not return.