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DTC 158-03-Fuel pump pressure has exceeded desired pressure
limits
Control Module : ECU
NOTE: If the Pressure Relief Valve (PRV) is replaced, it is necessary to perform the Replacement of the Rail Pressure
Relief Valve (PRV) - Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service.
See Common rail Relief valve - Configure - Reset ECU data (10.218), if necessary.
NOTE: If the rail pressure sensor B-9004 is replaced, it is necessary to perform the Replacement of the Rail Pressure
sensor - Reset ECU Data with the Electronic Service Tool (EST) before you return the machine to service. See
Common rail pressure sensor - Configure - Reset ECU data (Rail pressure sensor) (55.010), if necessary.
Context:
The Engine Control Unit (ECU) Y-9000 monitors fuel rail pressure. If the ECU A-9000 determines that the requested
fuel pressure can not be reached, a leakage in the fuel system is assumed and this fault will occur. For more infor-
mation regarding fuel system troubleshooting, see Fuel injection system - Troubleshooting (10.218).
Cause:
The ECU A-9000 has determined that a fuel system leakage is present.
Possible failure modes:
1.
Faulty fuel filters, clogged.
2.
Faulty low pressure fuel lines, clogged or damaged.
3.
Faulty high pressure fuel lines, clogged or damaged.
4.
Faulty electric fuel pump (if equipped).
5.
Faulty charge gear pump, low efficiency.
6.
Faulty high pressure pump, low efficiency or excessive leak-off.
7.
Faulty fuel injectors, external or internal leakage.
8.
Faulty Pressure Relief Valve (PRV), leaking or stuck open.
9.
Faulty rail pressure sensor B-9004 or sensor leaking.
10. Faulty fuel metering unit Y-9000
11. Faulty ECU A-9000, software.
Electrical systems - FAULT CODES
47866583_ 02/12/2015
55.12 [55.DTC] / 54
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