New Holland 3012 – ECU: Air Intake Temperature Sensor No Signal
Issue description
The Engine Control Module (ECM) has lost communication with the Air Intake Temperature Sensor via the CAN network. This indicates a complete interruption of the signal, preventing the ECM from receiving critical intake air temperature data needed to calculate the correct air-fuel ratio for optimal combustion. The root cause may be a faulty sensor, damaged wiring, a connector issue, or a broader CAN bus network fault.
Applies to these machines
50 machines- T6.120
- T6.140
- T6.145
- T6.155
- T6.160
- T6.165
- T6.175
- T6.180
- T7.165
- T7.175
- T7.190
- T7.210
- T7.225
- T7.230
- T7.245
- T7.260
- T7.270
- T6050
- T6070
- T6080
- T6090
- T7030
- T7040
- T7050
- T7060
- Puma 130
- Puma 145
- Puma 150
- Puma 160
- Puma 165
- Puma 170
- Puma 185
- Puma 200
- Puma 220
- Maxxum 115
- Maxxum 125
- Maxxum 130
- Maxxum 140
- Maxxum 145
- Maxxum 150
- B110C
- B95C
- 650M
- 750M
- 121F
- 21F
- 221F
- 321F
- 586H
- 588H
Check the cause
Visually inspect the Air Intake Temperature Sensor (typically located in the intake manifold) and its wiring harness for damage, frayed wires, or corrosion on the connector pins.
Ensure the sensor's electrical connector is firmly seated and locked by disconnecting and reconnecting it.
Check the wiring harness between the sensor and the ECU for continuity and for shorts to ground or power using a multimeter.
Test the sensor's resistance at different temperatures and compare the readings to the manufacturer's specifications.
Repair steps
Repair wiring or connector
If diagnostic checks reveal a damaged wire or faulty connector, repair or replace the affected section of the harness and ensure all connections are clean and secure.
Remove faulty sensor
If the sensor has failed, disconnect the negative battery terminal, locate the sensor on the intake manifold, disconnect its electrical connector, and carefully remove the sensor.
Install new sensor
Install the new sensor, ensuring it is seated correctly and torqued to the manufacturer's specification.
Finalize repair
Reconnect the electrical connector and negative battery terminal. Clear the fault codes from the ECU using a diagnostic tool, then start the engine to verify the fault code does not reappear.
Parts you might need
(20)OEM CNH part. Alternative part number: 84539252. Always verify with the specific machine's serial number.
Genuine CNH / Case New Holland
Intake Manifold Temperature Sensor / Boost Temperature Sensor
3408345Cummins
Intake Manifold Temperature Sensor / Boost Temperature Sensor
28-1080Quality Farm Supply (Aftermarket)
Intake Air Pressure and Temperature Sensor (T-MAP)
84395141Intake Air Pressure and Temperature Sensor (T-MAP)
5801714551Alternate OEM part number
- Air Intake Temperature Sensor84539252
Used on various New Holland and Case models
- Air Temperature Sensor86531126
Often used for CNH combines and harvesters
- Air Temperature Sensor86531133
Alternate OEM part number. Often used for CNH combines and harvesters
Sensor WIC Air Temp
SBA185746190Intake manifold sensor
Bosch Air Temperature Sensor
026123001ACommon OEM supplier part
Air Temperature Sensor
504307953CNH OEM part number cross-referenced from Bosch 026123001A
- Intake Air Temperature Sensor504369148
Listed for various T4, T5, and TD5 series tractors. Sometimes described as a combined pressure and temperature sensor.
- Intake Air Temperature Sensor134784232
Genuine New Holland part.
- Intake Air Temperature Sensor323016A1
Interchangeable for both New Holland and Case IH models.
Intake Air Temperature Sensor
323015A1Interchangeable for both New Holland and Case IH models.
Intake Air Temperature Sensor
87775490Interchangeable for both New Holland and Case IH models.
Listed for New Holland Agriculture
- T-MAP Sensor5801474160
OEM T-MAP sensor for FPT engines used in T5, T6, T7 series
- Air Intake Temperature Sensor84574743
Used on New Holland T8 series and Case IH Magnum
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