(Table 41, contd)
Diagnostic Trouble Codes for the Fuel Rail Pressure
J1939
Code
Description
Notes
157-2
Engine Injector Metering
Rail #1 Pressure : Erratic,
Intermittent, or Incorrect
The ECM detects one of the following conditions:
The amount of fuel delivered by the high-pressure fuel pump is greater than 480 mL/min (16.3 oz/min)
for at least 2 seconds while the engine is at low idle.
If equipped, the warning lamp will flash. The engine will be derated.
157-16
Engine Injector Metering
Rail #1 Pressure : High -
moderate severity (2)
The ECM detects one of the following conditions:
The fuel rail pressure is greater than 170000 kPa (24657 psi) for at least 1 second.
OR
The measured fuel rail pressure is greater than the desired fuel rail pressure for at least 2 seconds.
OR
The fuel pressure remains too high after the keyswitch has been turned to the OFF position.
If equipped, the warning lamp will flash. The engine will be derated.
157-17
Engine Injector Metering
Rail #1 Pressure : Low -
least severe (1)
The ECM detects that the pressure in the fuel rail is low for at least 0.5 seconds. The point at which this
diagnostic code becomes active is a calculated parameter based on engine speed and engine
temperature.
If equipped, the warning lamp will come on. The engine will shut down.
157-18
Engine Injector Metering
Rail #1 Pressure : Low -
moderate severity (2)
The ECM detects that the measured fuel rail pressure is lower than the desired fuel rail pressure for the
current engine speed for at least 2 seconds.
If equipped, the warning lamp will flash. Active regeneration will be disabled. The engine will be derated.
The engine may shut down.
1239-0
Engine Fuel Leakage 1 :
High - most severe (3)
The ECM detects that the pressure in the fuel rail is too low compared to the volume of fuel that is being
supplied by the fuel injection pump.
If equipped, the warning lamp will flash and the shutdown lamp will come on. The engine will be derated.
5571-2
High Pressure Common
Rail Fuel Pressure Relief
Valve : Erratic, Intermit-
tent, or Incorrect
The ECM detects that the fuel rail pressure is out of the expected range after the fuel Pressure Relief
Valve (PRV) has been opened.
This can either be high pressure (relief valve not fully open) or low pressure (fuel leak).
If equipped, the warning lamp will flash. The engine will be derated.
5571-7
High Pressure Common
Rail Fuel Pressure Relief
Valve : Not Responding
Properly
The ECM detects that the PRV has activated at least 50 times.
Perform this procedure to identify the cause of the PRV activation before replacing the PRV.
If equipped, the warning lamp will flash. The engine will be derated.
5571-10
High Pressure Common
Rail Fuel Pressure Relief
Valve : Abnormal Rate of
Change
The ECM detects that the volume of fuel being delivered is too low to open the PRV during a PRV test.
If equipped, the warning lamp will flash.
Troubleshoot any other diagnostic codes before attempting to test the PRV again.
5571-14
High Pressure Common
Rail Fuel Pressure Relief
Valve : Special Instruction
The ECM detects that the PRV has been open for a total of at least 300 minutes.
Perform this procedure to identify the cause of the PRV activation before replacing the PRV.
If equipped, the warning lamp will flash. The engine will be derated.
5571-16
High Pressure Common
Rail Fuel Pressure Relief
Valve : High - moderate
severity (2)
The ECM detects that the PRV is open.
If equipped, the warning lamp will flash. The engine will be derated.
This code will be reset when the PRV is closed and the keyswitch has been cycled.
Use this procedure in order to troubleshoot abnormal
fuel rail pressure.
UENR0612
93
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