TUBE AS 3375857 - Caterpillar

Table 1
Event Code
Code and Description Conditions which Generate this Code System Response
E268(1) Unexpected Engine Shutdown The Electronic Control Module (ECM) detects an engine speed that is equal to zero rpm without the activation of an engine shutdown device. The code is logged.
The ECM activates an operator warning in order to alert the operator to the condition. Probable Causes
Diagnostic codes
Fuel supply
Electronic unit injectors
Transmission (if applicable) or engine accessoriesRecommended Actions
Diagnostic Codes
Check for active diagnostic codes on Cat ET. Troubleshoot any active codes before continuing with this procedure.Fuel Supply
Visually check the fuel level. Do not rely on the fuel gauge only. If necessary, add fuel. If the engine has been run out of fuel, it will be necessary to purge the air from the fuel system. Refer to Operation and Maintenance Manual for more information.
Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
Check the fuel lines for the following problems: restrictions, collapsed lines, pinched lines and loose connections. If problems are found with the fuel lines, repair the lines and/or replace the lines.
Prime the fuel system if any of the following procedures have been performed:
Replacement of the fuel filters
Service on the low pressure fuel supply circuit
Replacement of unit injectorsNote: A sight glass in the low pressure supply line is helpful in diagnosing air in the fuel. Refer to Systems Operation/Testing and Adjusting.
Check the fuel tank for foreign objects which may block the fuel supply.
Check the fuel filters.
Check the diesel fuel for contamination. Refer to Systems Operation/Testing and Adjusting.
Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold weather operation. Electronic Unit Injectors
Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM.
Perform the "Cylinder Cutout Test" on Cat ET in order to identify any injectors that might be misfiring.
If Cat ET indicates a problem, remove the electronic unit injector from the suspect cylinder and install a new electronic unit injector. Refer to Disassembly and Assembly.
Ensure that the repairs have eliminated the problem. If there is still a problem, refer to Troubleshooting, "Injector Solenoid - Test". Transmission (if applicable) or Engine Accessories
Ensure free movement of the driveline.
Remove any engine accessories that may lock up the engine and inspect any engine accessories that may lock up the engine. The following list illustrates examples of engine accessories that may lock up the engine:
Hydraulic pump that is driven from the rear gear group
Air compressor
Engine oil pump
Other components that are driven by the engine