SEAL KIT- 1912430 - Caterpillar

Use this procedure in order to troubleshoot low fuel pressure or use this procedure if one of the following event codes are active. Refer to Troubleshooting, "Event Codes" for information about event codes.
Table 1
Diagnostic Trouble Codes
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
94-17 E198(1) Engine Fuel Delivery Pressure : Low - least severe (1) The code is logged.
94-18 E198(2) Engine Fuel Delivery Pressure : Low - moderate severity (2) The code is logged.
The engine power will be derated.
94-1 E198(3) Engine Fuel Delivery Pressure : Low - most severe (3) The code is logged.
The engine may shut down. Probable Causes
Fuel level
Fuel supply and return lines
Fuel pressure sensor installation
Fuel pressure sensor operation
Fuel filters and system prime
Air in the fuel
Fuel pressure regulator
Fuel transfer pumpRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Check the Fuel Level
A. Check the fuel level.
Fuel level
Result: The fuel level is OK.
Repair: Proceed to Test Step 2.
Result: The fuel level is low.
Fill the fuel tank with fuel.
2. Inspect the Fuel Supply and Return Lines
A. Visually inspect the fuel lines between the primary and secondary filter bases and the inlet to the fuel injection pump. Also, inspect the fuel cooler, if equipped. Inspect the fuel return line from the head to the fuel tank. Inspect the lines for restrictions, pinching, and swelling. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Inspect" for additional information.
Inspect Lines
Result: The fuel lines and the cooler (if equipped) are OK.
Proceed to Test Step 3.
Result: The fuel lines and the cooler (if equipped) are not OK.
Repair: Make the necessary repairs. Verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 3.
3. Verify Correct Sensor Installation
A. Check the installation of the fuel pressure sensor.
B. Check the wiring of the fuel pressure sensor. Refer to the engine Electrical Schematic. Ensure that all of the wires and the connectors are properly connected.
Sensor installation
Result: The sensor is properly installed and the wiring is correct.
Repair: Proceed to Test Step 4.
Result: The sensor is not properly installed and/ or the wiring is incorrect.
Repair: Install the fuel pressure sensor properly. Repair the wiring and/or the connectors.
4. Verify the Operation of the Fuel Pressure Sensor
A. Turn the keyswitch to the OFF position.
B. Remove the fuel pressure sensor.
C. Install a suitable pressure gauge into the low-pressure fuel system with a Tee fitting in the port for the fuel pressure sensor.
D. Connect the fuel pressure sensor to the Tee fitting.
E. Monitor the status for "Fuel Pressure" on the electronic service tool.
F. Crank the engine.
G. Compare the pressure reading on the gauge to the pressure reading on the electronic service tool.
Within 35 kPa (5 psi)
Result: The pressure readings are within 35 kPa (5 psi) of each other. The sensor is functioning properly.
Proceed to Test Step 5.
Result: The pressure readings are not within 35 kPa (5 psi) of each other. The sensor is not functioning properly.
Repair: Temporarily install a new fuel pressure sensor.
If the new