New Holland ENG 3037 – Engine Control Unit (ECU / ECM / Engine Controller): Boost Pressure sensor: Out of Voltage - Low

The voltage signal returning from the boost pressure sensor to the controller has dropped below the minimum acceptable threshold. This typically indicates a short circuit to ground, a disconnected/broken wire in the harness, or a completely failed sensor.

• T5 series
• T5.95
• T5.105
• T5.115
• T6 series
• T7 series
• T8 series
• TS-A series
• TS110A
• TS125A
• TS135A
• L216
• L220
• L228
• SR130
• SR160
• SR175
• SV185
• B90B
• B100B
• B110B
• CR-series combines

1. 1

   Inspect the sensor connector and wiring harness for physical damage, corrosion, or backed-out pins.

2. 2

   Disconnect the sensor and turn the key to the ON position to verify that the ECU is sending the correct reference voltage (typically 5V) to the sensor.

3. 3

   Test the signal wire between the sensor connector and the Engine ECU for a short to ground or an open circuit.

4. 4

   If the wiring harness is intact and the reference voltage is present, the sensor itself has likely failed internally and is pulling the signal voltage low.

1. 1

   Power Down

   Turn off the machine and disconnect the battery to prevent electrical spikes.

2. 2

   Locate the Sensor

   Locate the Boost Pressure Sensor (MAP sensor), which is mounted directly on the engine's intake manifold.

3. 3

   Disconnect and Remove

   Unplug the 4-pin electrical connector. Remove the retaining bolt(s) holding the sensor to the manifold and pull the sensor out.

4. 4

   Install New Sensor

   Lubricate the O-ring on the new sensor slightly to prevent tearing. Push the new sensor into the intake manifold port and secure it with the retaining bolt.

5. 5

   Reconnect

   Plug the 4-pin electrical connector back in, ensuring it clicks and locks into place.

6. 6

   Clear Codes

   Reconnect the battery. Turn the ignition on and use a New Holland Electronic Service Tool (EST) to clear the inactive ENG 3037 fault code, or run the machine to see if the ECU self-clears the code upon detecting the correct voltage.