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DTC 151-03-Fuel rail pressure has exceeded maximum positive
deviation 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) A-9000 monitors fuel rail pressure. If the measured rail pressure is lower than the de-
sired pressure by 100 bar (1450 psi) depending on engine speed, this fault will occur. For more information regarding
fuel system troubleshooting, see Fuel injection system - Troubleshooting (10.218).
Cause:
The ECU A-9000 has determined that the measured rail pressure is 100 bar (1450 psi) lower than desired fuel pres-
sure based on engine speed.
Possible failure modes:
1.
Faulty fuel metering unit Y-9000, internal failure.
2.
Faulty charge gear pump, low efficiency.
3.
Faulty fuel filters, clogged.
4.
Faulty low pressure fuel supply lines, clogged or damaged.
5.
Faulty high pressure fuel supply lines, clogged or damaged.
6.
Faulty Pressure Relief Valve (PRV), leakage.
7.
Faulty high pressure fuel pump, low efficiency.
8.
Faulty fuel injectors, worn, clogged or internal leakage.
9.
Faulty rail pressure sensor B-9004, drifted or leaking.
10. Faulty ECU A-9000, software.
Electrical systems - FAULT CODES
47866583_ 02/12/2015
55.12 [55.DTC] / 47
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