RING 8J6070 - Caterpillar

Probable Causes
Theft deterrent system
Aftermarket engine protection devices (if equipped)
Air inlet shutoff (if equipped)
The flash file is incorrect.
Speed/timing sensors
Fuel quality
Fuel systemRecommended Actions
Check the Theft Deterrent System
If the display screen on Messenger indicates that the theft deterrent is enabled, passwords must be entered before the engine will start.Check the Aftermarket Engine Protection Devices
Check the aftermarket engine protection devices (if equipped). These devices usually interrupt power to the ECM.Check the Air Inlet Shutoff System
If the engine was shut down due to the air inlet shutoff system, the air inlet shutoff must be manually reset.Check the Flash File
Verify that the flash file is correct for the engine displacement. The engine will not start if the flash file is incorrect. For example, a C15 engine will not start if a C13 flash file has been programmed into the ECM. Refer to Troubleshooting, "ECM Software - Install".Check the Engine Speed/Timing Sensors
The engine will not start and there will be no codes if both speed/timing sensors are disconnected. Verify that both speed/timing sensors are connected.Check the Fuel Quality
Check the fuel quality. Refer to the Operation and Maintenance Manual for information on fuel quality. Refer to Systems Operation/Testing and Adjusting for the correct procedure for testing the quality of the fuel.Check the Fuel System
Check the fuel system. Refer to Troubleshooting, "Fuel System Pressure - Test".