Troubleshooting

(Table 41, contd)
Diagnostic Trouble Codes for the Fuel Rail Pressure
J1939
Code
Description
Notes
5571-14 High Pressure Common
Rail Fuel Pressure Relief
Valve : Special Instruction
The ECM detects one of the following conditions:
The PRV has been open for a total of at least 300 minutes.
OR
The PRV has been 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.
5571-16 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 to troubleshoot abnormal fuel rail
pressure.
Probable Causes
• Diagnostic trouble codes
• Electrical connectors
• Fuel filters
• Fuel rail pressure sensor
• Fuel system inspection
• Fuel rail Pressure Relief Valve (PRV)
• High-pressure fuel pump
UENR0612-07 97
Symptom Troubleshooting
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