New Holland WorkMaster 50 Service Manual page 876

Electrical systems - FAULT CODES
DTC 237-04-Fuel pressure relief valve is forced to open, perform
pressure shock
Control Module : ECU
Context:
This fault is intended for information purposes only. Other active faults may have caused this fault to occur. The
Engine Control Unit (ECU) A-9000, if necessary, will set the engine into limp home mode. This process is achieved
in two steps by the ECU A-9000, a pressure increase and a pressure shock. The ECU A-9000 will execute step two
by a fuel pressure shock. This is achieved by setting injection quantity to zero. If this fault is active, the ECU A-9000
has performed step two for achieving limp home mode, a fuel pressure shock.
Cause:
The ECU A-9000 has performed a fuel pressure shock to achieve limp home mode.
47866583_ 02/12/2015
55.12 [55.DTC] / 155