SEAL 3P5384 - Caterpillar

Use this procedure to troubleshoot abnormal fuel rail pressure. Also, use this procedure if the following event code is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
157-7
Engine Injector Metering Rail #1 Pressure : Not Responding Properly E1069 (1)
Fuel Rail #1 Pressure Not Responding The engine fuel rail pressure sensor reading is unstable or incorrect.
Table 2
Associated Codes
J1939 Code CDL Code Troubleshooting Procedure
1076-7 18-7 The actual position and the desired position of the fuel actuator is not within specifications. Replace the fuel control valve.
1381-17 E2172 (1) Troubleshooting, "Fuel Transfer Pump Inlet Pressure Is Low" Probable Causes
Codes
Air in fuel
Relief Valve
Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
Recommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check for Air in the Fuel
A. Refer to Testing and Adjusting, "Air in Fuel" for additional information.
Air in Fuel
Result: There was NOT air in the fuel.
Proceed to Test Step 3.
Result: There was air in the fuel.
Repair: Determine the cause of the air in the fuel. Repair as necessary.
If the problem is not resolved, proceed to Test Step 4.
Illustration 1 g06089463
High-Pressure Fuel Pump
(1) Pump head
(2) Valve block
Table 4
3. Check the Fuel Pressure Relief Valve
A. Start