This instruction show you guide on how to solve AGCO machine rail pressure high trouble code 382 – SPN 157 – FMI 00 Rail Pressure HIGH?
What you need?
2026 AGCO EDT Diagnostic Software
Description
The measured rail pressure is over critical limit. Measured pressure is more than 1700 bar (24,656 psi). In normal conditions the pressure release valve (PRV) opens at a critical pressure (1600 to 1650 bar (23.206 to 23,931 psi)). In case PRV mechanical failure, EEM3 system continuously monitors rail pressure and if measured pressure more than 1700 bar (24,656 psi), engine will shutdown immediately.
Failure Mode Indicator
FMI 00 – Above normal operational range – most severe.
Failure Mode
Fault code is stored and warning lamp is activated. The engine will stop immediately. CAN message indicates, that shutdown is pending.
Possible Cause
- High pressure pump is not working correctly
- Rail pressure sensor wiring is defective
- Rail pressure sensor power supply is not correct
- Rail pressure sensor is defective
- Pressure release valve (PRV) is not working correct
- Control unit is defective
Diagnosis and Solution
- Check the high pressure pump:
- Look for possible high pressure pump faults and inspect accordingly (such as faults with wiring and connectors).
- Check the high pressure pump operation with Service Tool test function or have the pump inspected by an authorized Bosch service dealer.
- Check the rail pressure sensor wiring, connectors and contact surfaces of the connector pins (possible oxidation).
- Check the 5 V power supply to the sensor.
Rail Pressure Sensor
Check the rail pressure sensor operation.
Rail 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
In case of damaged pressure release valve (PRV), high pressure pump or wiring harness, replace damaged parts according service manual.
NOTE: High pressure parts removal, inspection and replacement should be performed only by qualified injection system service personnel. Special instructions may apply.
