HOSE 6G2007 - Caterpillar

Use this procedure in order to troubleshoot abnormal fuel rail pressure or use this procedure if any of the following diagnostic trouble codes are active. Refer to Troubleshooting, "Diagnostic Trouble Codes" for information about the codes.
Table 1
Diagnostic Trouble Codes    
J1939 Code    Code Description    Comments    
157-16     Engine Injector Metering Rail #1 Pressure: High - moderate severity (2)     No other 157-XX codes are active.
3509-XX codes are not active.
3510-XX codes are not active.
No codes for the high-pressure fuel pump or the injectors are active.
The fuel rail pressure is above an acceptable level.
The code is logged.
Engine power is derated.    
157-18     Engine Injector Metering Rail #1 Pressure: Low - moderate severity (2)     No other 157-XX codes are active.
3509-XX codes are not active.
3510-XX codes are not active.
No codes for the high-pressure fuel pump or the injectors are active.
The fuel rail pressure is below an acceptable level.
The code is logged.
Engine power is derated.    
1239-0     Engine Fuel Leakage 1: High - most severe (3)     3509-XX codes are not active.
3510-XX codes are not active.
There is a probable fuel leak from the high-pressure fuel system. The amount of leakage is a calculated parameter.
The code is logged.
The engine will shut down.    
5571-0     High Pressure Common Rail Fuel Pressure Relief Valve : Active     3509-XX codes are not active.
3510-XX codes are not active.
The pressure limiting valve in the fuel rail is open. This code is a calculated parameter.
The code is logged.    Probable Causes
Diagnostic trouble codes
Electrical connectors
Fuel filters
Fuel rail pressure sensor
Fuel systemRecommended Actions
Diagnostic Trouble Codes
Use one of the following methods to check for active diagnostic trouble codes:
The electronic service tool
The display on the control panel
Flash CodesElectronic Service Tool
Connect the electronic service tool to the diagnostic connector.
Check for active diagnostic trouble codes on the electronic service tool.
Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".Display on the Control PanelNote: The following procedure is only applicable if the application is equipped with a display on the control panel.
Check the display on the control panel for active diagnostic trouble codes.
Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Diagnostic Trouble Codes".Flash CodesNote: The following procedure is only applicable if the machine is equipped with the appropriate warning lamps.
Check the warning lamps on the control panel for flash codes. Flash codes are explained in Troubleshooting, "Flash Codes".
If any flash codes are displayed, troubleshoot the codes before continuing with this procedure. Refer to Troubleshooting, "Diagnostic Trouble Codes".Electrical Connections
Check for correct installation of the P1 and P2 connectors on the ECM. Check for correct installation of all other applicable connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Use the electronic service tool to perform a wiggle test.
If necessary, perform any repairs to the connectors or the wiring.
Check if the fault has been eliminated. If the fault is still present, proceed to "Fuel Filters".Fuel Filters
Replace the primary fuel filter and the secondary fuel filter. Refer to the applicable procedure in the Operation and