How to Solve AGCO Machine Oil Pressure Sensor Defect High and Low

Here is the instruction show you guide on how to solve AGCO machine trouble code trouble code 97 – SPN 100 – FMI 03 oil pressure sensor defect high and low error.

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AGCO EDT Electronic Diagnostic Tool

 

 

Oil Pressure Sensor Defect HIGH

The measured oil pressure signal is above the normal operating range (more than 4.7 V).

 

Failure Mode Indicator

FMI 03 – Voltage above normal or shorted to high source

 

Failure Mode

Fault code is stored and oil pressure warning lamp is activated. Engine power will be reduced (FL1). CAN message indicates active fault. Engine protection functions on oil pressure are not active.

IMPORTANT: Engine oil pressure protection is not active. The engine may be damaged, if oil pressure is too low.

 

Possible Cause

• Oil pressure sensor wiring is defective
• Oil pressure sensor power supply is not correct
• Oil pressure sensor is defective
• Control unit is defective

 

Diagnosis and Solution

Check the oil pressure sensor wiring, connectors and contact surfaces of the connector pins (possible oxidation).

Oil Pressure Sensor

 

Check the 5 V power supply to the sensor.

Oil Pressure Sensor

Check the oil pressure sensor operation.

Oil Pressure Sensor

 

Check the ECU operation with another EEM3 controller. If the system is functional and the fault is not active with the replacement ECU, then the original ECU is defective.

 

Oil Pressure Sensor Defect LOW

The measured oil pressure signal is below the normal operating range (less than 0.2 V).

 

Failure Mode Indicator

FMI 04 – Voltage below normal, or shorted to low source.

 

Failure Mode

Fault code is stored and oil pressure warning lamp is activated. Engine power will be reduced (FL1). CAN message indicates active fault. Engine protection functions on oil pressure are not active.

IMPORTANT: Engine oil pressure protection is not active. The engine may be damaged, if oil pressure is too low.

 

Possible Cause

• Oil pressure sensor wiring is defective
• Oil pressure sensor power supply is not correct
• Oil pressure sensor is defective
• Control unit is defective

 

Diagnosis and Solution

• Check the oil pressure sensor wiring, connectors and contact surfaces of the connector pins (possible oxidation).

Oil Pressure Sensor

 

• Check the 5 V power supply to the sensor.

Oil Pressure Sensor

 

• Check the oil pressure sensor operation.

Oil Pressure Sensor

 

• Check the ECU operation with another EEM3 controller. If the system is functional and the fault is not active with the replacement ECU, then the original ECU is defective.

ECU Replacement