DOWEL 3398780 - Caterpillar

Which Generate This Code:The Electronic Control Module (ECM) detects all of the following conditions for 15 seconds:
The engine speed is between 1275 rpm and 1800 rpm.
The rack position is between 19.2 mm (0.76 inch) and 25 mm (0.98 inch).
The actual boost pressure is 35 kPa (5 psi) below the desired boost pressure.
Atmospheric pressure is above 73.5 kPa (10.5 psi) and the altitude is below 2743 m (9000 ft).System Response:The ECM will log the event. The fuel is derated by 30 percent. The event code is latched until power is cycled to the ECM.
Reduced power
Test Step 1. Check for "ACTIVE" Diagnostic Codes
Start the Caterpillar Electronic Technician (ET).
Turn the keyswitch to the ON position.
Check for any active diagnostic codes or logged diagnostic codes.Expected Result:No diagnostic codes are present.Results:
OK - No diagnostic codes are present.Repair: Refer to Systems Operation/Testing and Adjusting, SENR5092 for information on inspecting the exhaust bypass.STOP
Not OK - There are diagnostic codes that are present.Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual. Ensure that the repair eliminates the problem.STOP