RETAINER-SEAL 1257923 - Caterpillar

Use this procedure 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 for Fuel Rail Pressure Problem
J1939 Code CDL Code Code Description
(Code descriptions may vary) Comments
157-16 E396 (2) Engine Injector Metering Rail #1 Pressure: High - moderate severity (2) No other 157-XX or 1797-XX codes are active.
3509-XX or 262-XX codes are not active.
3510-XX or 2131-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 E398 (2) Engine Injector Metering Rail #1 Pressure: Low - moderate severity (2) No other 157-XX or 1797-XX codes are active.
3509-XX or 262-XX codes are not active.
3510-XX or 2131-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 E499 (3) Engine Fuel Leakage 1: High - most severe (3) 3509-XX or 262-XX codes are not active.
3510-XX or 2131-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 E1264 (2) High Pressure Common Rail Fuel Pressure Relief Valve : Active 3509-XX or 262-XX codes are not active.
3510-XX or 2131-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 codes
Electrical connectors
Fuel filters
Fuel rail pressure sensor
High fuel rail pressure
Transfer Pump Inlet Regulator (TPIR)
Transfer Pump Inlet Regulator (TPIR) return
Return fuel lines
Low fuel rail pressure
Transfer Pump Inlet Regulator (TPIR)
Transfer Pump Inlet Regulator (TPIR) Return
Electric Fuel Lift Pump (EFLP)
Return fuel linesRecommended Actions
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.
Table 2
Troubleshooting Test Steps Values Results
1. Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the Warranty Report and the Product Status Report with Histograms before performing any troubleshooting or clearing any diagnostic codes.
Note: The downloaded information will be required by the Dealer Solutions Network (DSN) if troubleshooting assistance is needed.
C. Determine if a diagnostic is active or recently logged.
Diagnostic codes
Result: A code other than the codes in Table 1 is present.
Repair: Troubleshoot the code. Refer to the applicable troubleshooting procedure.
Result: One of the codes in Table 1 is present.
Proceed to Test Step 2.
2. Electrical Connectors
A. Check for the correct installation of the ECM J1/P1 and the J2/P2 connectors. Check for correct installation of the connector on the fuel rail pressure sensor.
Connectors
Result: There are suspect connectors.
Repair: Use the electronic service tool to perform the "Wiggle Test".
Repair or replace connectors that are suspect.
Result: There are no suspect connectors.
Proceed to Test Step 3.
3. Fuel Filters
A.