BLOCK 1734975 - Caterpillar

Probable Causes
Engine "derated"
Starting aids
Personality module (flash file)
Throttle position sensor
Electrical connectors
Circuit for the electronic unit injector
Turbocharger outlet pressure sensor (intake manifold air), rated fuel position and/or FRC fuel position
Air inlet and exhaust system
Fuel supplyRecommended Actions
Engine "Derated"
Use Caterpillar Electronic Technician (ET) to check for logged engine derates and/or for active engine derates. A derate status flag will appear on Cat ET if an engine derate is active. The engine may be derated due to one of the following conditions: high altitude, dirty air filters and other factors.Starting Aids
Cold Mode
Use Cat ET to verify that the engine has exited cold mode. Cold mode operation may slow throttle response.Air Inlet Heater (If Equipped)
Ensure that the air inlet heater is programmed to "On". Ensure that the air inlet heater is functioning properly. Refer to Troubleshooting, "Air Inlet Heater Circuit - Test" for additional information.Oil Grade Plugs (If Equipped)
Ensure that the correct oil grade plug is installed. Refer to Operation and Maintenance Manual for additional information.Personality Module (Flash File)
Verify that the correct personality module (flash file) is installed.Throttle Position Sensor
Monitor "Throttle Status" on Cat ET. Verify that the throttle position is stable and that the engine is able to reach high idle rpm. Refer to Troubleshooting, "Throttle Position Sensor Circuit - Test" for the proper troubleshooting procedure.Electrical Connectors
Check for correct installation of the J1/P1 and J2/P2 connectors on the Electronic Control Module (ECM) and on the unit injector connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect".Circuit for Electronic Unit Injector
Use Cat ET to determine if there are any active diagnostic codes for the unit injectors.
Table 1
Diagnostic Codes for Injectors    
Cylinder Number     Flash Code     CID-FMI     SPN-FMI    
1     72     1-11     651-11    
2     72     2-11     652-11    
3     73     3-11     653-11    
4     73     4-11     654-11    
5     74     5-11     655-11    
6     74     6-11     656-11    
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. Refer to Troubleshooting, "Injector Solenoid Circuit - Test" for the proper procedure.Turbocharger Outlet Pressure Sensor (Intake Manifold Air), Rated Fuel Position and/or FRC Fuel Position
When the engine is operating under a full load, monitor "Fuel Position" and "Rated Fuel Limit" on the Cat ET status screen. If "Fuel Position" does not equal "Rated Fuel Limit" then check air inlet manifold pressure.
Verify that there are no active diagnostic codes that are associated with the turbocharger outlet pressure sensor (intake manifold air) or with the atmospheric pressure sensor.
Monitor air inlet manifold pressure and atmospheric pressure for normal operation on the Cat ET status screen.Note: Atmospheric pressure is not a default parameter on a Cat ET status screen. A new parameter screen must be set up in order to monitor the atmospheric pressure sensor.Air Inlet